Personally, I think it's a question of balancing out how many oil treatments you do vs. how often you'll have to wash. Most people agree that the less you wash your hair the better, but it's difficult to go about with a head full of oil for days on end. So I usually do one or two deep oil treatments a week and CO wash them out the next day. This, combined with very sparse oilings right after I wash my hair, works for me.
Bookmarks