I use a towel to wrap my hair up in the shower or a bandana. & This trains your hair to be less oily without washing it, which helps repair your hair and make it more thick.
I do this every night I don't wash my hair after I take my shower and before I go to bed. I find that my hair is more oily on the side I sleep on so it's okay to do a touch up in the morning (:
I wash my hair on day 4 because the flour can make my hair look more dull but it still looks clean (: P.S washing your hair everyday also causes it to be more oily and strips nutrients. No bueno.