Is very little residual gel to remove and what is there it quickly wipes off the it is an exciting advancement over original tray white and stealth 9% hydrogen peroxide who the supreme is not a 9% we've been. Able to take that to a 10% meaning that for the supreme it is more efficacious but with the improvements in the jail in fact that it's kinder to the tissues and a product which has proven to be to have greater stability. And I will maintain at a high concentration for longer time. So we we feel excited about this product that's great I know I personally love the tray light has mailed trained and has a slight orthodontic shifting over time and they don't quite fit perfectly anymore and set aside that I didn't have to go and how to train remained. Less often and and I'm so glad you brought up the subject on the orthodontics the original tray white has proven to be virtually the only practical system for bleaching teeth that patients.