Why should I apply heat when using a deep-penetrating conditioner? What is the best way?
Keeping the head warm helps open the cuticle layer of the hair and allows the conditioner to penetrate more effectively. Your head can be wrapped with a hot towel or even plastic wrap. For an easy, no-mess cover-up, try a plastic processing cap like those your stylist uses, and apply dryer heat on a low setting. A bonnet dryer attachment is perfect for this purpose.