hi giraffe
dont know y u feel 'dirty' if u go a day without washing ur hair-most people wash their hair 1 to several times a week.if u wash it evry day it washes all the natural oil that protects the hair to some degree out,so will leave ur hair v.dry.best to wash it 1 to 3 times a week with olive oil soap(the natural stuff u can get from health food shops,)as its v. mild,then leave to dry.all the chemical gunk('normal' shampoo & conditioner that most people use)is best avoided & not needed.advertisers would have us all believe their chemical products r needed-not true.its damaging to hair & body.hope this helps .(ps-the soap is cheaper too,all told)