The bread holds the oil against both surfaces until the oil solidifies and bonds. If you have a zipper that won't open smoothly, just rub it with bar soap. Saw blades lubricated with soap cut easier too. If you have windows and drawers that stick, a lube job with soap will do the trick. Liquid soap or detergent in water helps remove wallpaper because it is a wetting agent that helps water hold and soak into the surface faster and better.
Soap is a daytime superstar that's often overlooked.
Soap's not just for washing anymore. They're also great for deeply carved fine furniture. For the ultimate cleaner upper, recycle your old electric toothbrush too. A foot is called a foot because it was the length of King Charlemagne's foot. An inch was the distance between knuckles on King Edgar's index finger.