So I have a 3-piece system with an off-brand battery and a joytech atomizer. The part where the actual fluid goes in appears to be just a bit of plastic with some cotton shoved inside. After using and refilling them a few times, the wadding has started to get gummed up. I've ordered new ones and, as replacement parts go, they're fairly cheap, but could I save money (and time) by plucking out the filling and replacing it with just ordinary cotton, or some other material? The plastic part doesn't seem to take much wear and tear, and if I did that I'd only need occasional atomizer and battery replacements.