Also on these boards
How to Restore a Whiteboard with Step-by-Step Pictures - to restore dry erase boards that are hard to erase: spray a clean board with wd40, wipe dry with paper towels. the wd40 fills in the dried pores of the board that hold in marker ink, making it easier to erase. I have been using disinfectant spray which smells terrible but works well. Will have to try this.
You can use Febreeze to clean a dry erase board that just wont erase (because the ink is very dried on) . Spray the board and wipe, it also helps recondition old dry erase boards.
Use Crayons for Dry Erase Boards instead of markers which dry out. I had no idea that this would work!
Tips for using and storing dry erase boards and markers - includes free packet of teaching tips to download