<human>:  What is the best way to remove stains from wallpaper?
<bot>: The best way to remove stains from wallpaper is to first try a solution of warm water and mild soap. If this does not work, then you can try a gentle laundry detergent, as long as there is no bleach in the solution. If these solutions do not work, then you may need to use a special wallpaper cleaner or a mild solvent such as rubbing alcohol or baking soda.