If at first you don’t succeed, smash your head on the keyboard. Then get a new keyboard and try again. 
I have a stack of busted keyboards in the garage…
most simple and sane way of makeshift disinfectant is alcohol soaked cotton ball, more sane than just pouring it on wound (and more effective because you do not need that much alcohol)
This link seems to suggest that hard liquor would work fine as disinfectant:
Things I never thought I’d find useful to know.