Clean human hair extensions with shampoo or a special hair extension cleanser.
Allow human hair extensions to dry thoroughly. You can lay them flat on a towel or use clothes pins to clip them to a hanger and then hang them to dry.
Place hair extensions in a plastic bag or a plastic storage container. Make sure the container has enough space to provide adequate space for the extensions to breathe and remain neat.
Place the storage bag or container in a closet shelf or drawer.