Just like other PPEs, you must take care of your kneepads. Just rub down a damp clean microfiber towel and wash the debris with lukewarm water. You can also do a little scrubbing to remove the dirt. For the straps just use a couple of spritzes of a disinfectant spray to prevent them from smelling and the bacteria. Also, you can do a thorough reading of your product to know the washing instructions.