Instructables
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I have a Logitech wireless laser mouse and after a year or so of use, the left click button would double click every time I tried to single click something. As can be imagined, this gets frustrating very fast. So, being the tinkerer that I am, I decided to open her up and see if it could be repaired. Sure enough, It's a pretty simple fix, if you have some common tools and a teaspoon (edit:a tablespoon) of patience. There are some very small parts involved, so you will want to make sure you ware working in a well lit, clean environment so that any parts that are dropped can be easily found. I have now performed this fix for the third time and decided to take pictures this time to share with others who may find this useful. Each time the repair lasts about 6 months to a year before needing to be redone. I imagine at some point the piece causing the problem will break, at which time the mouse will need to be replaced (unless you're determined enough to try and source parts). Good luck with your repair, I hope this helps.

EDIT: There are quite a few comments about the difficulty of step 8. I would advise that you read through some of the comments for various approaches to completing that part of the repair.

 
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Step 1: Remove batteries

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If you are working on a wireless mouse, you will want to first open the battery cover, and remove the batteries from the mouse.

Step 2: Access screws

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On this particular model there are four screws which hold the mouse body together. These screws are located underneath the slide pads on the underside of the mouse. To remove the slide pads, gently pry the edge of the pad up with a small flat head screwdriver and peel it off. They are held in place with some sort of adhesive.

Step 3: Remove screws

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Remove the four screws with a small philips head screw driver.

Step 4: Open her up

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At this point the top cover should lift off, revealing the mouse's innards.
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artimis36d made it!5 months ago

Thank you very much. It took me around 15 mins to complete the fix (on a second attempt).

Actually
you just need to increase the strength of the curved part (the spring),
so you can use a steel rule or whatever to slightly flatten the curved
spring, then put it back on the contacts.

After you flattened the spring, it will be harder for you to put it back on the tiny switch.
I don't have tweezers with me, I used a pair of nose pliers to put the spring back in place. My mouse is like new again.

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dmiranda811 months ago
I cant believe it worked. After some yelling and time I finally got the damn copper piece into place. THANKS!
csheng11 year ago
Hi, thank you very much for the great tutorial - I've tried it and my mouse is working fine. May I suggest that for step 8: Reinstall tension spring, you (1) place the curved tab (which is in the middle of the spring) at an angle on the tiny ledge of the metal piece on the mechanism first, then (2) hook the spring onto the front part of the mechanism, before finally (3) sliding the spring beneath the rear part of the mechanism?

I did not have much luck with the original action series of 2-1-3 until I tried 1-2-3 and the whole spring just slid into place while pivoting on the middle curved tab.

Hope this helps. And once again, thank you!
kjbaumga2 years ago
Excellent description. I was planning on trying it when my mouse started doing this. My mouse isn't Logitech, but apparently LOTS of mice have this problem.

But before I tried your fix, I found the following post on the Logitech forums -- amid 6 pages of complaints by people having similar issues:

"This problem is due a build up of Electro Static Field (ESF) on the plastic. ESF is most troublesome in very low humidity environments. The internal circuitry design must not be robust enough to handle the gradual build-up of ESF that can occur through use. Can't comment any more on the specifics since I'm a Mechanical Engineer and not an Electrical Engineer.

Blowing air (from your mouth, not a can of air) into the crack under the left mouse button fixes this issue because human breath is very moist. You can also recreate the problem by rubbing a piece of cloth over the left mouse button repeatedly to generate ESF." - Abhishek Shinde

Feeling a little silly, I gave it a try: I blew into my mouse, under the left button. THE PROBLEM INSTANTLY VANISHED. It has not recurred even once in over a week of continual use. (It had been happening about every 5-10 clicks, driving me nuts.) So ESF buildup is apparently the problem in some cases.

So before opening up your mouse, you'd definitely want to try this, because it is so simple.

Might as well pass along my other research. I found someone had created a software fix for a similar problem with a Microsoft mouse: Browse down the site below, and you'll find it. This is untested by me, since the above fix worked for me. I'm just passing it along for someone who might not want to open their mouse, and who gets no result from the "blowing" technique.
http://www.danieljackson.co.uk/fun/old/

Thank you very much for the information on ESF. It's been very dry and static-y lately, and my mouse started having problems with selecting (double clicking). I replaced the mouse, but the new one is having the same troubles. (Which was very suspicious.) I believe ESF is the actual culprit. Thank you!

Instantly fixed my problem, which has been driving me crazy for several weeks.

Owner of a Performance MX Darkfield mouse and never thought for once simply blowing under the left click button would fix my Issue without invasive measures like taking my mouse apart. Seriously all it takes is to literally breathe life back into the product.

AmeyaS3 days ago

How do you open the small rectangular box inside....I tried but just couldn't get it open...applying a bit more force caused the solder pins to slightly force out of their socket which is not right, right!!! Well..that scared me off....Now my left click is even worse than before.

Sigh! I am fed up of these mouse clicks acting up every 6-7 months and going bad by a year's end. The mice quality nowadays have decreased quite a lot...my first mouse I brought in 2004 is still hobbling on (coming to my rescue now) where as I have gone through dozens of these new fanged mice since..

Guys, is investing in a really expensive mouse a better idea or buy a el cheapo mouse and toss it in the bin in about 8-12 months time (which is mostly the mileage on those things)

vassilevb made it!2 months ago

The little metal prick took me four hours to install back in its place. My back hurts like hell. Thanks a lot for the guide!

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That's an awesome kit. where did you get that holder with magnifying glass thing?

frEmn (author)  Azeunkn0wn14 days ago
I got mine at Harbor Freight. -http://m.harborfreight.com/helping-hands-60501.html?utm_referrer=direct%2Fnot%20provided

Hi there

I did it in just 4 minute.

1 I opened the mouse Genius

2 Looked for the microswitch

3 cleaned the microswitch with spray electronics cleaner 3 times clicking the microswitch

4 closed the mouse

5 whoa! is working again pretty fine

nafiej16 days ago

I cant believe it works. Ahahaha...

Thanks alot

I had to do this for a Genius Gila gaming mouse and it offered a bonus difficulty in the form of macro buttons surrounding the left button mechanism, denying access from the sides. I finally got it in by - using the images in step 8 as a reference - getting the left and right parts of the copper piece secured with the spring itself improperly perched over its hook, then slowly pushing the spring downward into place with a tiny screwdriver.

I can't count the hours, because I took a day long break from this hell after dropping the spring into a pile of things I probably should have cleaned up by now.

Why can't the mechanism for the left and right buttons be the same as the ones for the macro buttons? They seem smaller and simpler.

Thanks for this instructable!

JeronC22 days ago

Thanks for the great information.

When I saw this was the fix, I just threw away my Anywhere MX mouse and bought another mouse from another company. I won't be buying a Logitech product any time soon.

Marc66FR made it!23 days ago

Thanks a lot for these instructions

Step 8 is effectively the hardest. I fixed 2 mices and after the second one, I found an "easy" way to get this copper blade in:

- For my 1st mouse, I inserted the hook at the front and slid the back between the 2 contacts. The spring (curved part) "naturally" got in front of its pod so the whole assembly was stable. I then pushed the spring up into the notches

- For my 2nd mouse, the switch was different. The latches for the cover were not at the ends, but on the side, in the middle. The pods were also a bit different. To put the blade back in, I aligned the spring with its pod, then slid the blade between the 2 contacts in the back. Using a flat screwdriver, I slowly pushed the top so it would fall in the front notch. This was quite easy as the top of the pod curves down towards the notch. Using the same screwdriver, I brought the spring up into its notch.

I need to fix a friend's mouse, so I'll try this last method and see if I can fit it in less than the 45 minutes it took me for the other 2...

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MikeG14 months ago

And here I am just fixed a mouse the hard way... I desoldered the clicker and soldered in one from an old mouse! I honestly never even thought to try opening up the clicker! D'oh!

I replaced one microswitch. It is not hard task to do, but sometimes it may be hard to find an old mouse. I took the replacement switch from old mouse. As I'm right handed and use left button mostly, I took micro switch from the right one button, which is not used so often. Maybe next time I will try this.

frEmn (author)  MikeG14 months ago
Hopefully the switch you put in was better quality. As you can see by the popularity of this instructable , there seems to be a quality deficiency in these switches. There was a comment earlier where someone found a higher quality switch and swapped it out as you have done.
ShahzaibI1 month ago

hi admin i have a serious problem here. i have done step 8 successfully and i also close the box but when i try to put the white button inside, it doesn't click. plz reply fast

ViníciusP11 month ago

Well, I destroyed my mouse. Thanks.

frEmn (author)  ViníciusP11 month ago
I'm very sorry to hear that. Was there a particular step you had difficulty with? Maybe I can amend the tutorial to prevent other people from having the same problem.
PBo341 month ago

Hi,

I fixed my mouse switch one month ago, using WD40 and contact cleaner. After 2 weeks, double clicks started coming back, and after a month it was as bad as if I had done nothing.

So I tried an other method: I used a very small piece of sanding paper, grit around 1000 to clean the 2 contact surfaces, then sprayed contact cleaner, then applied some special contact grease (the one I have is nyogel from nyelubricants.com).

It takes 15 minutes altogether. I hope it will last longer, contac surfaces being clean and grease protecting them from oxydation and wear.

I had some cheapest Dell mouse that started doubleclicking, I found this article and started my homemade repairs but this spring man... I bent it in so many ways with screwdriver that it wouldn't fit and hold in its place by itself without me holding it, hence I had no way to put back a capsule on top of it. Anyway I'd try it the spring would relocate slightly thus making it a failure. I rage quit after like 2 hours of hopeless tries, mouse payed ultimate price tho... decapitated and killed with fire.

SinkatE11 month ago

I have a mouse which cost me USD 7.99 or so : I think I shall junk it and buy a new.

SinkatE11 month ago

I have a mouse which cost me USD 7.99 or so : I think I shall junk it and buy a new.

SinkatE11 month ago

I have a mouse which cost me USD 7.99 or so : I think I shall junk it and buy a new.

SinkatE11 month ago

I have a mouse which cost me USD 7.99 or so : I think I shall junk it and buy a new.

RyanF61 month ago

The best method I found to get the spring back on was to start by attaching it to the front hook. Next, at an angle I positioned the curved part on the corner of the middle piece and then slid the back of the spring up under the back part. I then just carefully moved everything into alignment by pushing it in towards center. Once I figured this out, I was able to put the spring back on in little time. Mouse works as good as new, thanks for all the tips everybody.

Welp, I followed your instructions to the letter, and the spring broke! And I was as delicate as could be! Even a piece of sugar glass wouldn't have broke so easily!

Don't know what else to say other than I tried my best and won't be able to get another mouse for a while.

djordjelabat2 months ago

Tthanks mate! Great tutor. I have fix LG Performance MX

My version of step 8: 1) put on place rear part of the mechanism 2) then hook the front part 3) after that I used toothpick to push curved tab down on place

PBo342 months ago

Hi guys,

I want to thank you so much for sharing your findings.

My mouse is a Logitech M505, whose switch started failing after about a year.

First, I want to say that I have had a bunch of mice over the last 30 years, and I can tell you that one of them, an IBM brand was used for many years, and although about 20 years old, still works like new. And it's not the only one. So I suspect those failing switches to be nothing but a programmed failure.

Now the positive part: following jrothermel 's idea,after removing the click case, I visually checked the shape of the switches parts which looked good, so I just cleaned it

1. blew it with a compressor (low pressure: 3 bars)

2. cleaned by spraying a good amount of WD40 with the little pipe

3. blew it with air again to remove the WD40 in excess

4. finished by spraying generously with a good contact cleaner (mine is Bardahl)

It's probably over-fixed, 1 or 2 of the previous steps might do it, I just don't want to open it again very soon. Now it works like new again. The only delicate moment is removing the click case, which is easy with a sharp blade, then a micro screwdriver.

MiguelC42 months ago

Awesome guide, I could fix my Deathadder following every step. Now I can try with my 2006 World Cup Logitech and my old CM Spawn. Thanks!

woodsielord made it!2 months ago

Logitech G700 that has been acting up for 2 years fixed in 45 minutes. Such a shame they use the same faulty parts in so many mouses.

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lodyr2 months ago

Hi!

Here's an article on how to repair the double click Logitech Anywhere mouse MX. Maybe it will help someone.

http://dimasio.com/quick-repair-of-the-logitech-anywhere-mouse-mx-black-usb-double-click.html

RaneshN2 months ago

Very very very good post. It really works .......................... Thank you so much.

imagizer2 months ago

I've found my double click issue to have been the result of the plastic that is pressed down on the butten having worn down to make a groove. After filling up the groove with some super-glue the problem is solved!

No need to open up the tiny button. I advise the next person that faces the double clicking issue to check for the groove in the plastic first, and, if present, fill it up with super glue. Then offcourse wait for the glue to completely dry before reassembling.

GTutusaus2 months ago

Worked like a charm on my Logitech Performance MX. Step 8 is indeed the trickiest one, but using your procedure, and with a bit of patience, the thing works perfectly now. Thank you for this great tutorial, frEmn!

ranggakumal2 months ago
haha... it works... thanks...
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