The best writing markers: even, high contrast lines and once dry these are also quite smudge-proof. Technically a wet erase marker, these fluorescent markers are a must have for any lightboard user. A dry paper towel will wipe off all but a very light residue, clean glass with a foaming glass cleaner periodically. Shake well and prime by depressing the writing point several times before the first use, then very occasionally during normal use.