What kind of milk did you use? even though I never tried it myself, I have heard that coconut milk helps soften curls to make them easier to get straight.
I dont even know why milk would work to help straighten. Well...coconut milk maybe but that's different than cow milk...I've defimitely tried that as a conditioner that was reccommended from someone on a forum and trust me...my hair smelled like dairy and was starchy feeling.. blehhh
I sprayed 1/3 cup of whole cows milk and left it for 20 minutes, then washed my hair with my shampoo and conditioner. It didn't smell but the curls were still there.