Yesterday, I accidentally stained a couple of keycaps of my GMK “True Olivetti” set with blue pen ink. My right ring finger had inadvertently gotten a small smudge of blue ink and, after typing in a few sentences on my keyboard, I realized a couple of keycaps (namely “O” and “L”) were stained with blue ink as well.
I tried rubbing it off with a little bit of water, and it helped a bit, but there are still some traces of ink left. What would be the most effective way to leave my keycaps as new, without damaging them?
Yes as others said Isopropyl alcohol is fine with ABS.
But DON’T EVER use something that contains acetone like nail cleaner as it will definitely melt your caps: acetone is commonly used to glue ABS pieces together