I just had the Brazilian Blowout and the hairdresser did this procedure : Wash, blow dry, apply Brazilian straighter, flat iron, rewash and then re dry. My friend went to a different salon and she was told to not wash her hair for 4 days and will wash and re dry on her own. My question is will my straightening not be as effective, or was it a newer and/or different procedure. Thanks for your answers in advance.