REMOVE INK FROM CONTROLLER

I never had to remove ink, but I would suggest rubbing alcohol and q-tips or cottonballs.

You can try using some cotton balls or wipes with cutex remover don't soak the cotton just get it damp , you don't want the remover to damage your controller. (use at own risk). Hope it helps

At your own risk try a small amount of bleach ona wipe or maybe mums nail varnish remover small amount only a suggestion

Rubbing alcohol should do the trick or even some wet tissue wipes

Must definitely try using some rubbing alcohol, q-tips and being careful not to get electrical components wet.