I used rubber gloves of the kind you can get at any grocery store. The medalian in the middle of the wheel comes off by twisting it in one direction or the other, can't remember which. Under that is the metal parts, a spring, (don't loose it) and a rubber donut which you can get via the KFOCI manufacturing fund. This piece is usually crumbly junk by now and that is normally the problem. I replaced mine and it works perfectly now.