1. Heat the cap in the microwave on medium power for 60 seconds. If needed, continue heating in additional 60-second intervals, up to a maximum of 3 minutes.
P.S. Alternatively, you can warm the cap in the oven at a very low temperature.
2. Apply your hair treatment, cover your hair with a shower cap, and wear the heated cap on top for 15–20 minutes.
3. Rinse the treatment from your hair after use.