It's not mine i found it here
link1. Make him take a shower.
2. Make him use shampoo in aforementioned shower.
3. Make him use clarifying shampoo.
4. Apparate next to him, hand him a tube of super-strong facial cleanser, then quickly Disapparate before he realizes what happened.
5. Enchant this cleanser to follow him around until he uses it.
6. ...enchant the cleanser to follow him around anyway.
7. Tell him you stole his teddy bear.
8. Tell him you won't give it back until he agrees to wash his hair.
9. When he washes his hair, tell him you were just kidding and said teddy bear has already...
