I also ran across several sites that suggested using fabric softener as a detangler. I didn't want to make Rapunzel's hair too greasy so I made a solution of about 2 TBSP of fabric softener and the rest water - this is a little travel spray bottle - it has now become Rapunzel's Magic Hair Spray
THIS IS AWESOME! You can make DIY hair detangler spray that works better than the expensive detanglers you are purchasing! It takes only a few ingredients and 2 minutes to make! Full tutorial by Designer Trapped in a Lawyer's Body.