I recently discovered that orange citrus cleaner you can buy at home depot is an excellent hand cleaner. I keep a bucket of it around and when my hands get greasy, dip hands in, remove and rub hands together as you would normal hand cleaner, and then rinse in another bucket of water. works great when I am lubing up parts, and then when ready to install I need clean hands, i.e. interior stuff. lasts a long time.

 

btw- i like to use microfiber towels for for thinfpgs not super grungy, drops dirty one into citrus an good as new next day