Quick and simple little trick that I found out today.
Problem: you go to the range and collect cases for various types of cases. You sort them and label them. You probably label ZipLocs or various plastic boxes.
Not a problem until you decide to put something else in the container.
Solution: Hoppes #9.
You probably already use it to clean the guns you shoot. It also cleans off Sharpie like it was never there. Give it a second to dry off and you’re good to go for another round! :-)