Offex White board Cleaner is Specially Formulated to gently and effectively cleans and refreshes all types of white boards without leaving streaks or residue. Offex White Board Cleaner is a non-toxic, commercial-grade cleaner. Directions: Turn nozzle to "SPRAY" setting. Apply 1 or 2 sprays to areas of the boards to be cleaned. Let penetrate for a few seconds and wipe dry. Always check manufacturer's instructions before applying to your equipment. When empty, remove cap and rinse bottle before recycling.