Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to restore a whiteboard [title] Clean you erasers of as much marker dust as possible by brushing, beating, and vacuuming. [step] A lot of cleaning problems actually start with a dirty eraser. Be sure to beat them out, and take a vacuum hose to it as well to get as much dust out as possible.

Ending1: [substeps] Shower your erasers one at a time to make cleanup easier, and wear rubber gloves to protect your hands as you wipe. Clean your erasers in the sink as well. Ending2: [substeps] If you clean sheets, wash their edges with the brush beforehand, just in case the stain is trying to seep through the pillowcase. If you clean other items in the room, make sure that they're clean of stain. Ending3: Your eraser will suddenly be much more effective. [title] Erase the whiteboard with your dry eraser. Ending4: [title] Wipe down and dry your whiteboard. [step] Lightly dusting your whiteboard will prevent water from seeping underneath of the board and possibly knocking your erasers out.

Answer format: ending1/ending2/ending3/ending4