Used to have a few water soluble UV marking pens to do similar in bathrooms and break rooms. Testing showed that just spraying plain water and wiping once with a paper towel after 48 hours of cure time still removed almost all trace of the markings on a hard surface, but we were writing dates in places like the bottom of toilet seats, back edge of countertops, door handle plates (where normal use of the handle wouldn't smudge it) and refrigerator doors and finding them still legible a week or more later, even though cleaning crews were supposed to be cleaning and sanitizing those surfaces daily.