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Should I use a flux pen?

While soldering, some contacts don't want to take the solder even after heating it. I think some of them might be dirty. Could I use a no-clean flux pen like this to clean the contacts and also make soldering a little easier?

Using a flux pen on old boards is a very good idea. If the board is very old too, you can scrub the contacts with special fibre glass brush.
Arya42 (author)  steveastrouk1 year ago
Do you recommend the no-clean kind?
Yes, I haven't seen the other kind for a long time !
Arya42 (author)  steveastrouk1 year ago
Thanks for your help! I decided to go with a mild rosin flux pen because I use 60/40 rosin-core solder.
lemonie1 year ago
Don't ask "should?" - it's too vague. What you want to know is whether it's worth buying?

L
frollard1 year ago
Flux is to soldering what beatings are to slavery - you can't have one without the other.
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