[s-cars] temp control buttons sticking.

[northrup]

A couple of the temp control buttons stick in the depressed position. 
Eventually they work their way out.  Sometimes tapping the button 
helps.

I suspect resolution of this issue is simply a matter of cleaning.  Does 
anyone have a recommondation for cleaning the buttons?  Maybe an 
electronics cleaner of some type, that is not harmful to the black 
plastic?

wilson '00S4