Different color dry erase markers, especially red and, even worse, green are notorious for leaving a haze due to the dyes in their pigment. This can happen on any style of whiteboard surface and can even occur on glass surfaces too.
1. Use high-quality, (avoid low odor) dry-erase markers to avoid poor erasability. 2. Replace markers when almost dry to avoid poor erasability.
General cleaning instructions for whiteboard:
1. Wipe surface with a clean cloth moistened with a high-quality whiteboard cleaner or warm water. Note: Using a non-appropriate cleaner may result in poor dry erasability due to the build-up of residues from the cleaner on the surface.
2. Rinse with clean, warm water to remove any cleaner residue.
3. Wipe surface dry with a clean cloth.