Six steps to clean a membrane keyboard.
IMPORTANT - NOT FOR LAPTOPS or NON-MEMBRANE KEYBOARDS
WHAT YOU'LL NEED:
lint free cloth
can of compressed air or vacuum cleaner
flat tip screwdriver
pinch of water OR 1 part water - 1 part alcohol (denatured)*
#1 Shutdown, unplug computer & keyboard.
#2 Using the screwdriver, gently remove keys (don't forget to make note of their position - better yet take a photo & print out beforehand) if you have more than one keyboard, use that as your guide, as I did.
#3 Use compressed air to remove dust & debris from keyboard.
#4 Clean keyboard with slightly damp cloth or cotton swab (do not put liquid directly on keyboard!) I dipped cotton swab, then squeezed out excess liquid.
#5 Clean each key individually (slightly damp cotton cloth).
#6 Replace keys (nothing should be wet or damp).
*available at most hardware stores - btw I used plain water
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