How long do you have to keep the tin foil in your hair after dying it with kool aid?

I'm not an expert on this & wish i can do more to help but here are a couple of links that i hope will help you with what u are looking for. Good luck.->

http://www.fatmixx.com/2003/09/21/hair-dye-help/

http://search.yahoo.com/search;_ylt=A0geup7uXktMTE...

Here are some step-by-step instructions to successfully dying your hair with Kool-Aid, Including the plastic bag/ tin foil method :)

http://www.wikihow.com/Dye-Hair-With-Kool-Aid

I hope this was of use to you, and good luck :)

Chloe xxx

till the aliens arrive in their ufo to toke you away!