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!6 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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dmiranda81 year 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!

Nice tutorial! Worked perfect for me! My only complaint with my mouse now is that the left click is quite loud after the fix, but it no longer dbl clicks so I am a happy man.

Thats! that fixed my problem.

at first you can hear the click and it would register either 2 clicks or no clicks.
now i need to press a little harder but it works fine. Might need to re-tension the springs again

FelipeR39 days ago

I feel like a NASA engineer now! Thanks really!

gberthia11 days ago

If you want to save yourself a lot of trouble check first to see if the white plastic button is worn out, if this is the case don't open the mechanism box. I noticed the plastic button on my mouse was curved from wear and just super glued a small piece of plastic on top of the button and it was fixed in minutes.

alexcher8412 days ago

Thanks for the article. Fixed my left mouse button, which was an issue to begin with. Had to open the right mouse button clicker to use as a reference, to make sure I was putting the spring in correctly (did not remove the spring). After assembling, the left mouse button was perfect, but right one stopped clicking for whatever reason. Removed the spring on the right button, attempted to reinstall, but it would not get a good gap between the spring and metal mechanism. Reinstalled twice and no clicking still. As I was reinstalling 3rd time, I broke the inner part of the spring :( Now, no right button at all.

That brings me to a question, does anyone know where to buy replacement clicker springs? :) It's either that, or I have to get a new mouse.

frEmn (author)  alexcher8412 days ago
I haven't sourced them myself, but several people in the comments have mentioned replacing the entire microswitch (either from a donor mouse or buying the part alone). If you scan through all the comments you should find it.
VictorC520 days ago
Yeeaahh I fixed it! Be patient and you'll get it!
AmeyaS1 month 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)

you can buy new buttons to solder on, and this is usually a longer-lasting solution too, if you decent quality micro switches, which are cheaper than whole mice.
Yeah but micro switches are not available at any general local electrical store usually...it will be hard to find good quality ones at descent prices compared to buying a whole new mouse.

I managed to open my micro switch by the way, the latch was on the length sides of the small rectangular box instead of top side like in Logitech mice (mine's was Microsoft). But when I got to the small metal spring inside, I ended up bending it totally out of shape (it's very delicately shaped and placed to fit inside the micro switch), ended up switching the metal spring from the middle click (which I don't use anyway).
Wouldn't recommend it to anyone with flabby, shaky hands.. and guys, don't throw away your old mice, harvest the good micro switches inside (or at least the good metal springs inside).
Lochu9123 days ago

Done it. I woke up after work and my mouse was clicking 2 three times every time i pressed the LMB. Even though i opened those many times before i had no idea this could be the reason. I thought this is probably drivers or newest win updates. worked thanks.

LexiM23 days ago

Now I know just in case

mahesh_jo24 days ago

nice instructable. last sunday i have also repaired my mouse as it was causing the same double click problem. But I desoldered the button and replaced it with an old mouse right click button.BTW cheers.

JackieW227 days ago

Thank you SOOOO much! I have a cheap Daffodil Wireless USB-hub mouse that has been functioning just fine for 7 months, then suddenly started either registering multiple clicks or no clicks at all when I hit the left mouse button. My whole purpose of buying the mouse was to make Minecraft & D3 so much easier to play (Apple mice aren't really gamer-friendly). I was so bummed at losing my gaming mouse! After scouring the internet for what could be causing my problems, I found your solution... and it worked!

My only problem was getting the "bend" in the spring right. In the end, my husband handed me another old Bright wireless mouse whose buttons were working fine but was suffering from bad contacts elsewhere. I harvested the spring off of that one (there must just be one company that makes these springs, because they looked exactly the same) and surgically implanted it in mine. Now it works just fine!

Including the time wrestling a little bit to get the spring in the right way & STAY, this took me all of maybe 15 minutes. THANK YOU!!!!

mk2001 JackieW224 days ago
Apple isn't gamer friendly
kst18224 days ago
?but I think change a new button is better.
sottinger24 days ago
I usually have doner mice that I take the button from. normally they are the same buttons all around so no big deal. good to know other ways to fix it.
sukiwayne124 days ago

This an awesome tutorial i did it within 10mins and mines working perfectly and no problems, Thankyou.

LanaM25 days ago

thanks for the info.

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.

vassilevb made it!3 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)  Azeunkn0wn1 month 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

nafiej1 month 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!

JeronC1 month 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!1 month 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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MikeG15 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)  MikeG15 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

ViníciusP12 months ago

Well, I destroyed my mouse. Thanks.

frEmn (author)  ViníciusP12 months 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.
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