The cardboard box might have gotten soggy due to moisture or may have come in contact with chemicals or moss. And that certainly leaves a mark on the shelf. For the clean-up operation, these particular stains are more difficult to diagnose and fix. Don’t panic! We’re here to make life easier.
Scrape off any hard residue stuck on the shelf with a plastic scraper. Do not force it. Clean the surface with a clean cloth.
Mix 1/2 a cup of white vinegar and 1/2 a cup of baking soda in a container. Pour the mixture into a clean, empty spray bottle and top up with warm water. Baking soda and vinegar are natural cleaners that will absorb the stains.
Spray the affected area with a cleaning solution. Let it sit for 15 minutes. Pick a scrub pad which is suitable for the surface and clean the area.
Blot the residue away with a dry absorbent cloth and let the surface dry thoroughly.