Doll Hair Spray: Fabric Softener in a spray bottle will transform doll hair "back to normal". 2 TBSP of fabric softener and the rest water in a little travel spray bottle, perfect for little hairstylists hands. This solution is similar to what is reccomended for American Girl Dolls.
Update: It works! I used in on the Kanani American girl doll - and she has a ton of hair! SWEET! How to Detangle Doll Hair...a solution of about 2 TBSP of fabric softener and the rest water in a little travel spray bottle = Magic Hair Spray.