That's what I should do. I don't like taking showers in the morning but that may be what I have to do or else henna less often. If I keep hennaing, I'm going to get a higher dye content henna to see if it covers greys better. I don't have a lot of greys but the ones I have are hard to cover with henna. I go back and forth on if I want to keep doing henna or switch to box/salon coloring.