Davines naturaltech purifying shampoo it cleanses and purifies the scalp fighting against microbial attacks and creating a heal173thy and clean environment how to use apply 20 gr of product to the scalp with damp hair and massage in especially on those areas most affected leave on for a few minutes rinse off thoroughly intensive treatment twice a week for maximum 3 weeks maintenance treatment once a week for 6 weeks the maintenance treatment can be interrupted earlier than 6 wee