If you’re installing new wallpaper and have leftover glue, you can remove unused wallpaper paste from the bucket or pan it’s in by letting it dry. If it’s an oil-based paste, seal it in a plastic bag and throw it in the garbage. Otherwise, toss the leftover wallpaper paste in the trash. Although it’s water-soluble, don’t rinse unused wallpaper paste down the sink because it could dry in the pipes and cause a blockage.

Wallpaper steamers can be very helpful for removing large sections of wallpaper more easily, but they’re not always a good idea for DIYers. The drywall behind your wallpaper is meant to stay dry, and excessive moisture from improper technique with a wallpaper steamer can leave you with severe wall damage. Drywall also retains moisture, which could result in mold growth over time. It’s best to hire a professional to remove your wallpaper with a steamer to avoid wall damage and related moisture issues.

Yes, most professionals patch and smooth walls after removal to prepare for new finishes.

Using a fabric softener solution is a popular and low-cost DIY method for removing wallpaper, but its effectiveness is limited. While it may work on some types of wallpaper, it is unlikely to be successful on vintage styles, and there is no evidence that it is more effective than other removal methods. There are also several potential downsides: the solution can leave behind a residue that may damage your walls or interfere with the adhesion of new wallpaper. Additionally, this method can create a strong, overpowering aroma that takes a long time to dissipate, making it a poor choice for homeowners sensitive to smells.