My TV remote control has been a bit hit and miss. Sometimes it
works and sometimes it doesn't. I took it apart and cleaned it as
follows:

ONE
I carefully wiped some gunky residue (food? drink?) from inside
using tap water on a paper cloth to dissolve it. That included:

(a) the rear of the one-piece rubber keypad
(b) the part of the circuit board containing the key contacts

Maybe I should have used distilled water but I made sure I wiped
the water off until it was almost completely dry.

TWO
I then used isopropyl to remove any oils or grease residues on (a)
and (b) above.

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I have read he
http://www.tvantenna.com/support/tut...oterepair.html
that the rear of the rubber contacts are coated with some special
conductive compound. I thought it was conductive rubber else I
expected some little pieces of metal foil behind each key. Oh
well!

Is water or alcohol likely to remove the coating that page refers
to?

Is it completely crazy to very LIGHTLY sandpaper the contacts on
the board? I would using 1,000 grit or even the soft "flour"
paper usd to finish off varnishes on furniture. The contacts look
like some sort of carbon and might take two or three very GENTLE
strokes.