I've asked about this on the Xbox board but I'm getting conflicting advice from my own researches so thought I'd come here and ask if anybody knows. Used original Xbox (Samsung) DVD drive, well known disc tray drawer sticking problem, simple enough solution: clean or replace the drive belt.; no problem. But it is also recommended that the exposed plastic gears and tray drawer runners are carefully lubricated as well. What to use though? That's the question. Some have said a product that contains PTFE/Teflon is recommended as a persistent protector/lubricant. However they often contain other questionable substances like silcone or lithium grease, graphite and even petroleum based oils which are definitely not OK for use with many plastics. I have also come across several references online which claim PTFE/Teflon itself is not suitable for use with certain plastics (some types of polycarbonate and polystyrene). So does anybody here know what type of lubricants the manufacturers of disc drives (any make) recommend or actually use themselves?