5 ms·An air duster suffices for this purpose. No need for something so fancy as liquid nitrogen.by kmfrk 14y agoAn air duster suffices for this purpose. No need for something so fancy as liquid nitrogen.ygra 14y agoDepends on whether you need minutes or hours :-)kmfrk 14y agoYou can probably reapply it. :) I wouldn't know, though.