I clean banks and doctor's offices also. I have used anti-bacterial hand gel with great success. Rub it into the ink and go do something else leave on the ink for about 5-10min. rub off with soft cloth or whatever cleaner you normally use. I've also removed permanent marker from countertops with it, adhesives, and chewing gum from a carpet. It will also remove black shoe marks from tile floors, and scuff marks from walls. I now keep a bottle with me at all times and when you're done cleaning you can use it on your hands.