I've seen doll collectors do the hot water dunk on synthetic doll hair which is suppose to be better than Downy dunk. For one there are no chemicals - just plain water, heat which adds moisture and the process is quicker - within minutes not 24 hours.
Julie has kinks in her hair from pony tails and braids so I wanted to smooth them out. Since we can't use heat tools on the synthetic hair, heated water/steam can provide similar results.
Then I wanted to do this to Molly's who LIVES IN BRAIDS and Felicity.
When I bought Felicity her hair had 2" of DAMAGE so I trimmed all of that melted fried mess off. Molly is an older PC doll and her hair is simply DRY.
I love the results!
Silky shiny hair.