Well, if you have a laptop and you allready ripped them off, but it leaves that white residue, then you can get some pam, or just a store brand cooking spray, and get a little on a paper towel. You have to get your nail and scrub for a while, but this is the most important part. IT COULD TAKE UP TO TEN MINUTES:MAX. Then, once majority is gone, get a peice of tape and work the rest off. Then wet a paper towel, and ring it out. then, scrub over it to get the greasy-ness off, then dry it. It should be all gone. The clean -up is easy. All you do is put up the spray, throw away the towels, and your all done!! :) Hope this helps!