We typically recommend washing once a month or when you have been in contact with smells that stick in the hair such as smoke. Do not wash the extensions while they are in your hair. Its best to wash your clip-ins using the bathtub faucet or shower faucet. Do not use a ruff, back and forth motion on the hair extensions. Be sure to thoroughly wet the hair, then use an extension safe shampoo and lightly run it over the hair, no scrubbing needed. Rinse thoroughly, squeeze out excess water and apply conditioner throughout. Proceed with rinsing out all product. To dry, wrap a microfiber towel around the hair and squeeze. You can hang dry or blow dry but be sure to blow dry the extension fully before you clip it in.