I just had a thought
In just about every mall I've been to in America, there's a stand selling products made from stuff found in/at the dead sea. I dont know what the deal is, but this company seems to fly in a load of young people from Israel to sell their products to unsuspecting Americans before flying them back to pick up some more dead sea stuff
Anyway, one of the products they sell is a mango and pineapple hand scrub, but it works very well on a noggin too. You just need to use a little, because its fairly coarse, but it does work quite well.
I have a jar in front of me, and its called Swisa Beauty Sead Sea Salt Mineral Treatment for Hands & Feet
Its a great exfoliator and smells great (assuming you like the smell of mango and pineapple)