I clean them with antibacterial cleaner and soap and extremely hot water after every use. I don't share them and I don't use anything but glass and silicone. I've debated boiling them regularly, as well.
the only time I would share is if it was in my house( 3 some, swinging), I would never let any take them. As I dont loan anything I am not willing to lose.I wash them before never know what dust might be on them, and after each use.Soap and or toy cleaner and hot water.