One. What to do if wallpaper turns yellow?
1. If the wall surface is not completely dry when wallpaper is applied, the alkaline substances in the wall surface may react with the base of the wallpaper, causing discoloration. This phenomenon is difficult to treat and requires removing and re-applying the wall surface.
2. If yellowing occurs after several years of living, this is usually due to paper materials aging from exposure to sunlight and air. In this case, you can use "safe bleaching solution" to wipe the surface with a cloth, and then wipe it again with clean water after half an hour. It is recommended to first test a small area on the wall to observe the effect. If the effect is ideal, you can use it to treat the entire wall surface.

3. If the surface becomes discolored due to smoke, apply a diluted alkaline solution with a cloth.
Two. Daily maintenance precautions for wallpaper
1. When the house is unoccupied for extended periods, use curtains or blinds to block direct sunlight. Also, during cooler periods, avoid directing the heat from air conditioning or other devices directly onto the wallpaper, as wallpaper can also be affected by heat, leading to deformation or discoloration.
2. Everyday smoke or kitchen fumes can cause wallpaper to yellow quickly. Moisture and dampness are the primary causes of stains, detachment, and mold growth. To avoid these issues, it is important to maintain proper ventilation and humidity control.
3. Pay attention to daily cleaning. All wallpaper surfaces should be vacuumed regularly to remove dust. A vacuum cleaner or duster is sufficient. It is best to avoid directly washing the wallpaper with water. If there are stubborn stains like oil that are difficult to remove, use a rubber eraser or lightly wipe with a damp cloth after applying a cleaning solution.
4、Cleaning new wall coverings, such as metal wall coverings and fiberglass wall coverings, requires special instructions from the wall covering manufacturer during installation. For serious issues, professional wall covering installers can be called to perform on-site cleaning.