I second the motion on mild soapy water and maybe on isopropanol
(test first).

But acetone! Don't do it. It's just too good at melting plastic.
And the last time I tried it - on the plastic film layers of a
bubble keyboard I was  smart and tested it on the plastic - didn't
melt.  OK right?  Nope!  Even the very gentle motion across the
traces removed them ***most*** effectively.  Embarassed...I went
out and bought another keyboard.

Actually, another  reason I wouldn't bother with organic solvents
like acetone is that they aren't that good at removing the kind of
problems I have encountered which are usually sticky, sugary
water-based things and just normal dust and dirt.

I'm a fan of  mildly detergent water - and if I'm in a hurry for
drying - blot it best you can then stick it in front of the fan (a
dehumidifier would be great).

BTW, I may have missed it - but those new bubble keyboards are a
cinch to clean inside.   The plastic sheets often come apart
easily and you can run them through the water - just don't rub the
traces off or you'll be looking for one of those conductive ink
pens. I never liked them - preferring the switch type.  But I'm
coming around after having reassembled I don't know how many
switches when I couldn't find one to pirate.  Of course I wouldn't
want to ruin a vintage machine by putting a new keyboard on it....

Enjoy -

Bob

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