There are many ways to clean stains, depending on the type of stain and the material it is on. If the stain is a liquid, you can pour a pot of boiling water onto the stain and wait a few minutes until it cools. If the stain is a solid, you can use a vacuum cleaner with the hose attachment to suck up the stain. If the stain is on fabric, you can use hydrogen peroxide or dish soap mixed with water to clean it.