Try Goop.
Here is the link to it on Amazon. I grew up doing a lot of farm work on tractors, various power tools, etc. We would swear by this stuff to clean our hands. Make sure you use it on dry hands for dirty hands, not with water. I use it in the laundry when I have bad grease stains and it works great. Good luck.
-Doug
It is the mind itself which builds the body.
-Joseph Pilates