Scissors get sharper the more you cut aluminum foil with them

Do your commonly used office or kitchen scissors get dull after a while, leaving tape sticky on the blades or making it hard to cut through packaging materials? Take a piece of aluminum foil from the kitchen and fold it into four to six layers. Then, take your dull scissors and repeatedly cut the foil into thin strips. Do this about twenty to thirty times. During the cutting process, the slight resistance from the aluminum metal acts like a very fine whetstone, automatically grinding and straightening the tiny burrs on both sides of the blade. After you're done, cutting paper will be instantly smooth and effortless!