Put two tablespoons of liquid Downy fabric softener in a spray bottle of water and just spritz your doll’s hair with the softener solution any time you need to give her a touch up or even if she needs some major work. http://dolldiaries.com/softener-spray-for-doll-hair-care/
Diy fabric softner mix in a jug one bottle of your choice conditioner (i used suave rosemary and mint), six cups water and three cups distilled vinegar. stir, not shake. use as you would any other liquid fabric softner.