Bug Repellent: Mix 2-teaspoons peanut butter with 1-teaspoon borax and 1/2-teaspoon baking soda. Put it where you see ants coming in your home, but be sure to keep pets away.
Fix squeaks: Peanut butter’s natural oils work as a decent substitute for WD-40. If you have squeaky hinges, just apply a bit and wipe it clean.
Leather cleaner: Put a small amount of peanut butter (creamy, not chunky) on a soft cloth, then use a circular motion to wipe the spot on your couch or chair. The natural oils dissolve the spot and shine the leather.