I tried this as well, I thought it would be a good substitute from needing to wash my hair often when I was on holiday and got this stuff. Boy was I surprised at how awful my hair looked, I didnt expect it to make my hair look freshly washed but it had a powder residue that no matter how much I brushed it wouldnt come out completely , my hair looked cleaner before using it than after.

So far I think dry shampoos are a gimmick I'd rather just wash my hair put in some leave in conditioner and walk out the door on the days I dont feel like drying and styling.