Use a cleaner such as a mild glass cleaner to cut out the grease and dirt buildup from normal use. Spray cleaner lightly onto the grip portion and wipe clean. Do not put the Versa Gripps in a washing machine or immerse them in water. Should the velcro portion become stuck with debris, simply pull clean with tweezers. Make sure to air your Versa Gripps out after each workout, and do not leave them in your gym bag to prevent them from developing an unpleasant odor. These precautionary measures will ensure a long life for your Versa Gripps. We highly recommend our exclusive, breathable Taslan Stuffsak that will help to keep your Versa Gripps clean and dry between workouts.