[sdiy] Why Acetone might actually be best for cleaning 'conductive rubber' contacts

[drheqx]

1) use as I do a lateral abrasion which levels the entire surface again 
so that there is again an exposure of the conductive material or

2) use a solvent that actually does briefly dissolve away some of the 
non-conductive material but leaves the conductive alone.

Well it would be pretty hard to dissolve carbon, so the target is the
substrate. To my knowledge it is silicone, but it may be a urethane in
some cases. 

In some cases you can slice off the conductive tab from a cheapo switch
and glue it into a faulty CR button. Old computer keyboards are the
source.



heqx





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