The stuff you use to clean vinyl records that comes in those little containers is isoprophanol. You should be able to get isoprophanol at a good chemists - if you tell him /her what its for and only require a few mils they should sell it to you.

Nail varnish remover is acetone with oils... you will need to degrease the proc now.

Failing all else, make friends with a tv and video repairman, we used to go through tons of the stuff cleaning video heads!