Do not wash your hair more than 3 times during the initial treatment phase, as this could eliminate some of the product from your hair.
If you use only the lotions, then brushing your hair thoroughly every morning will suffice. However, if you use the ultra-intensive cream, you will need to wash your hair.
You can then maintain the repigmentation of your hair according to the results and your desires: you will need to apply the product once or twice per week to maintain your hair colour. If you see that your hair is beginning to lose its colour again, you can always increase the number of times you apply the product per week.