Quartet - QRT550 Extend the life of your board by keeping the surface stain-free with this Dry-Erase Board Spray Cleaner. Help your Quartet dry-erase board resist ghosting and staining with regular use. Cleaner also makes it easy to keep your dry-erase board clean and clear by removing dry-erase ink, dust and dirt. The pH-balanced, nontoxic, and low-odor formula is made using plant-based ingredients. It is recognized by the EPA's Safer Choice (DfE) Program and meets U.S. EPA Safer Product Standards.