The first time my nephew discovered that crayons work on walls, he covered a four-foot section of hallway while his mom was on a work call. She sent me a photo. It was genuinely impressive — the kid had range. Circles, squiggles, what appeared to be a dinosaur. All in deep purple.

She tried a magic eraser first. It took off the paint along with the crayon. Then we went down a YouTube rabbit hole and found the method that actually works without destroying the wall finish.

Start with the gentlest thing that works

Plain white toothpaste. Not the gel kind — the classic white paste. Put a dab on a damp microfiber cloth and rub in small circles over the crayon marks. The mild abrasives in toothpaste are strong enough for wax but gentle enough for most painted walls.

Wipe the area with a clean damp cloth afterward to remove any toothpaste residue. Let it dry and check — for light crayon marks, this is often all you need.

If toothpaste isn’t enough

Make a paste of baking soda and water — about the consistency of pancake batter. Dab it onto the crayon marks with a soft cloth, let it sit for one minute, then gently rub. Baking soda is slightly more abrasive than toothpaste, so test a hidden spot first if your walls are flat or matte finish.

Rinse thoroughly with a damp cloth. Baking soda residue left on the wall can look chalky once dry.

The WD-40 nuclear option

If toothpaste and baking soda both fail, spray a tiny amount of WD-40 onto a cloth — not directly on the wall — and wipe the crayon. The solvents in WD-40 break down wax fast. This works on basically every surface.

The tradeoff: WD-40 leaves an oily residue. You need to follow up immediately with warm soapy water to clean it off. And test first — some flat paints will absorb the oil and leave a permanent dark spot.

What to skip

Magic erasers. They work by micro-sanding the surface, which on painted walls means you’re removing the paint itself. Your wall will look clean but the sheen will be different, and in certain light you’ll see exactly where you scrubbed.

Also skip abrasive scrub pads, steel wool, and anything labeled “heavy duty.” Crayon is wax. Wax surrenders to solvents and mild abrasives. You don’t need to bring industrial equipment to a wax fight.