How to Remove Wallpaper Glue?

After peeling off old wallpaper, a sticky residue of adhesive is usually left behind. You must remove it before painting or hanging new wallpaper, or the finish will be bumpy and won't adhere. Warm water and a mild solution dissolve most wallpaper glue.

What you need:

• Hot water
• Dish soap and/or white vinegar
• A sponge or spray bottle
• A plastic putty knife / wallpaper scraper
• Towels and a drop cloth

Step-by-step:

1. Protect the room. Lay down a drop cloth and towels along the baseboards, since this gets wet and messy.
2. Mix a removal solution. Combine hot water with a few squirts of dish soap. For stubborn glue, add 1 part white vinegar to a few parts hot water — the mild acid helps break down the paste.
3. Apply generously. Sponge or spray the solution onto a section of the wall until the glue is thoroughly wet.
4. Let it soak for 5–15 minutes so the adhesive softens.
5. Scrape it off. Use a plastic putty knife or scraper at a low angle to lift the softened glue. Work in sections, re-wetting as needed. Avoid gouging the wall.
6. Wash the residue. Wipe the wall with clean water and a fresh sponge to remove the last sticky film.
7. Let it dry completely (often a day) before priming and painting.

Tips: A commercial wallpaper-adhesive remover or an enzyme-based gel works well for tough jobs. To test if all glue is gone, run a wet hand over the wall — it should feel smooth, not tacky.