A white board, or dry-erase board, is a glossy white surface used for nonpermanent markings. Normally, you use a special white board eraser to erase markings on the board. Over time, it becomes more difficult to erase marks from these boards with the eraser. When this happens, repair the white board by cleaning it with a special white board cleaner or with a homemade cleaning solution.
Place a small amount of white board cleaner on a clean, soft cloth. Purchase special cleaning solutions for white boards from office supply stores. Alternatively, make a homemade cleaning solution by mixing 1/2 cup vinegar with 3 cups water. Another homemade cleaning solution option is to mix 3 tbsp. baking soda with 1 tbsp. water.
Clean the white board with the rag by rubbing the entire surface of the board with a moderate amount of pressure.
Repeat as necessary until the white board has no marks.
Rinse the cloth with cold water.
Wipe the entire surface of the board with the wet cloth.
Dry the white board by wiping the board with a clean dry cloth.
Read more: How to Clean or Fix a Dry Erase White Board | eHow.com http://www.ehow.com/how_7510017_clean-dry-erase-white-board.html