Using these Theratools Notched Toe Stones is super easy. Just place them between your toes. The unique 'Pac - Man' shape and notched design will help them stay in place no matter your toe size or shape. You can use them with either heat or cold depending on your needs. When it comes to cleaning, use warm, soapy water to wash them, then rinse with clean, warm water and let them air dry. For extra cleanliness, you can wipe or spray them with an FDA - approved sanitation solution. Remember, don't use harsh chemicals as they might damage the soapstone. Keep them in a dry place when not in use to maintain their quality.