what happens when it rains?Cut the old ones off. I've used a small amount of dish soap for years to slide new grips on and hold them in place. When dish soap dries it's very sticky and I've never had a problem with slipping grips. In addiiton, when you want to change grips the "adhesive" is water soluable and a little H2O between the grip and bar will allow you to slip them right off. Just one of many ways of doing it I suppose, but it's worked for me.