Hi I am starting in an eco-friendly, organic/vegan salon. So far I have used the CND callus file which I quite liked. I really want to go that little bit further with the hygiene protocols and sterilize (autoclave) my equipment. I know the opinions on the necessity for this differ greatly, so please I don't want to start that argument again. Does anyone know any foot files that are all metal so that you can sterilize them? (Not just disinfect) I had a look at the tweezerman with the replaceable pads but imo that is not really too eco-friendly as the pads are single use. Any suggestions?