I had a left grip that was spinning. The previous person used Gorilla glue. I had to scrape it off using a utility knife but it worked fine. I put it back on using Gorilla glue, which may sound stupid since it didn't work the last time but Gorilla glue can be finicky as most people use it wrong. You need to WET the inside of the grip first with water.......a step which most people forget but is KEY when using the stuff. Spread a thin layer of the glue over the bar and slip the grip on. You have a few minutes to adjust it how you want which is nice. 4 hours later and it'll be on there like iron and its not going anywhere for a while!