Saw this on another website. When the Wilson Pro Overgrip starts to get dirty and loose it's tackiness, spray liberally with Windex window cleaner and wipe briskly with a paper towel. This will remove the dirt leaving the grip white again. Allow to dry for a couple of hours and it's nice and tacky again! I tried this last night, and while it doesn't return it back to new.....it definitely gives it a few more sets of life!