For those of you unfamiliar with these extremely useful dive tools, dive slates (plastic tablets) and wetnotes (notebooks of waterproof paper) can be written on underwater and passed back and forth between divers. Instructors can use dive slates and wetnotes to communicate complex ideas with students underwater as well as to record survey data when exploring new caves. Writing on underwater writing utensils is just as easy as writing in dry air and there is no miscommunication with your buddy - a must on every dive. Easily cleaned off after the dive, a diver slate or note book should be with you on every dive.
Divers have tried a lot of ways to clean their slate and/or wetnotes: kitchen cleansers like Ajax and Jif, as well as toothpaste and sandpaper. But they all pretty much make a mess and are not very handy either. The solution is Trident Erase-A-Slate. It looks like a small sponge, but it's not abrasive and it's not soapy. To remove your carbon/graphite pencil notes in a moment just wet it and wipe. We aren't talking elbow grease... just wipe. We don't know how it works, but it works great and there is no soapy residue so you can just throw them in your dive bag or dry box.