today I successfully repaired my car's keyless remote fob because one of its little rubber buttons (the "lock" button) stopped working.
In short, I followed directions I found in a YouTube video: I added a small piece of aluminium foil to the underside of the problematic rubber button -- and presto! Now the button works perfectly!
However . . . I did not glue the aluminum foil to the underside of the rubber button, because I was merely testing this solution to see if it actually worked. So when I pried apart the fob to get at the piece of foil in order to actually glue it in place, I found that the foil had adhered itself not to the rubber underside of the button, but rather to the small motherboard itself in the fob (the foil completely covering the four little contacts in the motherboard). And I could see that the foil was on there good, too, merely from the pressure of me repeatedly pressing the "lock" button when testing the solution.
Again, the fob now works flawlessly. And yet I'm wondering: could it be somehow bad for the foil to be in constant contact with the the metal contacts on the motherboard?
On the one hand, there seems to be no downside to the fob being "fixed" this way; on the other hand, how do I know the foil's constant touching of the contacts on the motherboard isn't "invisibly" running down the battery, or doing something else that will damage the fob?
Experience tells me "if it ain't broke, don't fix it" -- that is, what I did, though not quite how I planned it, works and works well, so I should leave it alone and be happy it works . . . rather than troubleshoot a problem that may not even exist. What do you all think?