dry shampoos?

the title says it all. what are they? do they leave residue? do they clean? are they good or bad for dreads and dread progression?

thanks guys

updated by @kubilay-kapucu: 01/13/15 09:57:00PM

they are basicly ..corn starch

they dont clean they just absorb oils

in straight hair they are meant to absorb oils then be brushed away

in dreads they will absorb oils then stay in the dread...pointless

just another stupid thing salons recomend to keep your hair dirty without being oily

why would u want a dry shampoo when wetting and washing while wet helps them dread

--
My new book Ban The Taboo Vol 1

well dry..yea think about it its not liquid but dry ...so a type of talc ..powders ect silica maybe few other harmful things in mix and actually those are bad for our lungs too ..anyways i wouldnt recommend using them can calm oily hair...an no they dont clean anything just cover up still have wash regular its all for the money...companies get out of us. peace

Yeah...using one of those would basically be spraying straight-up residue right into your hair. Completely counterintuitive.