I've been using my Protege for over a week now with the 510 adapter and it's great! I had a few teething troubles with the switch not firing, but after tightening and loosening the adapter a few times it now works perfectly. Lovely warm vapour - very consistent. I've noticed that the switch button and its little collar(the piece that the button sticks out of) are starting to go grey. This may be because of my dirty sweaty paws, but I'm dubious of using a cleaner to clean it up. What do you suggest? Brasso? Duraglit? Enriched plutonium? I'd be grateful for any tips that you might have. Thanks!