says
sorry i mean on skin
Pat and quick wipe with a wet sponge will do.
If you are slightly OCD, a toothbrush will do a "deep clean" nicely.
Haha, just tap water will do. Towel? Whatever is on the kitchen counter or wash basin.
How long have you had the pips? I replace around 4-6 months. Once the grip starts to fade, you can't get it back.