I never tried design essentials foam. I do about 2 pumps of the kercare, a size of a quater of serum, and I put my jojabo oil in a bottle that sprays pretty thin, and give my whole head a couple of sprays all over after the other products. I keep a water bottle on hand in case my hair starts to dry.
I never tried that saran wrap thing, but I think I will give it a try next set.