Buying a duo means planning for more than one bottle. In Onion, Biotin & Rosemary Wash Duo, the shampoo and treatment have separate roles and appear at different points in the listed routine.
Prepare the whole sequence
Read both packages before beginning. Keep the treatment and a shower cap within reach so you can complete the stated method without stopping midway to search for them. Check that the product and amount match the listing you ordered.
Complete the cleansing step
The listed shampoo directions begin with thoroughly wet hair and scalp. Lather an appropriate amount in your palms, apply it, gently massage, and rinse thoroughly. Finish that rinse before starting the treatment.
Give the treatment its own instructions
The supplier's listed method says to apply the treatment evenly to the hair ends, put on a shower cap, leave it for 3 minutes, and rinse with warm water. Follow the actual package if it gives different directions. Do not borrow this time for another set or extend it in the hope of a better result.
Keep ingredient information attached to the right bottle
The selected information lists onion bulb extract for the shampoo and biotin and rosemary leaf extract for the treatment. Check each package for its complete current formula. A shared set name does not mean both bottles contain the same ingredients.
Explore Shampoo & care for sets and single cleansers. For comparison, the Avocado Shampoo & Conditioner guide describes a different placement and wait time.