It really depends if you are a avid golfer or not. To me an avid golfer plays regularly, at least once a week and practices a couple times a week. If you are an avid golfer then I would recommend that you change your grips every year. I would also recommend that if you practice a lot that you routinely clean your grips at least once a week. Simply take a damp towel and wipe all the grips. This will remove dirt, dust etc. Then after you wipe the grips down take a dry towel and remove the excess moisture. You will be amazed how new and tacky the grips feel. This process will keep your grips feeling like new for a very long time.