Make sure you clean your masturbation sleeve before and after each use. Even open-ended sleeves need to be cleaned, too. If possible, take the sleeve out of the case (if there is a case). You can use warm water and soap or an anti-bacterial sex toy cleaner -- whichever you prefer. Thoroughly clean your sleeve and wipe down the case. Allow both to dry completely before reassembling. To help your masturbator feel like new whenever you use it, add renewing powder after your sleeve is completely dry. This will help prevent tears in the sleeve and keep the material supple so it always feels good. That way you get the real feeling you crave once you add lube. If you know you’re hopeless about keeping your stroker clean, consider wearing a condom while you jack off. You’ll still need to clean your masturbator, but there will be less mess. Cleaning will be easier and quicker.