How to fix a Barbie with "the frizzies": The first step is to brush barbies hair the best that you can. Then simply “dunk” her hair in really hot water for about 30 seconds and towel dry. Brush and style your barbies hair. Once the hair is dry the frizz and snarls will be gone. OK, it’s not that magical but it will leave your barbies hair looking much, much better.