Whiteboards become difficult to erase cleanly over time — dry-erase marker residue builds up in microscopic scratches on the surface, causing ghosting (faint shadow images of previous writing) and staining. The board hasn't worn out; it needs a thorough cleaning of the accumulated residue.
Daily Cleaning
- Use a dry eraser immediately after use — erasing fresh marker is far easier than erasing marker left to dry for hours
- Clean the eraser itself by tapping it against a hard surface or vacuuming to remove accumulated powder — a saturated eraser smears rather than erases
- Wipe down with a dry microfibre cloth after erasing to remove loose powder from the surface
Removing Ghosting (Weekly Deep Clean)
- Apply isopropyl alcohol (70% or 90%) to a clean cloth — not directly onto the board surface
- Wipe the entire board surface in long horizontal passes
- Allow to dry completely before writing again — 1–2 minutes
- For stubborn ghosting: write over the stained area with a fresh dry-erase marker, then erase immediately — the solvents in fresh marker re-liquefy the dried residue and allow it to erase
Removing Permanent Marker
- Write over the permanent marker with a dry-erase marker of any colour
- Erase before the dry-erase marker dries — the solvent in the dry-erase marker dissolves the permanent marker underneath, allowing both to wipe off
- Repeat if necessary
Restoring a Very Stained Board
- Apply a small amount of non-gel toothpaste to a damp cloth and rub onto the stained areas in circular motions — the mild abrasive very gently removes surface contamination
- Wipe clean with a damp cloth, then dry
- Apply a thin layer of dry-erase board conditioner (available at office supply stores) to restore the smooth writing surface