I know there are a lot of different types of cleaning tools out there to remove ink from your hands but I have found this to be the best.
It is simply a type of hard pumice sponge (size 4"x 2") purchased at my local Dollar store.
You don't even need to use soap. Just wet it a little and with a few swipes you're good to go.
It does the trick for me so if you can find this at your local dollar store I'm sure you'll be impressed too. And only a buck! Great find!