Attempting to shower with slivers of leftover soap is one of life’s little struggles. Combine the smaller pieces into one bar by nuking them in the microwave. Use a knife to chop the soap into smaller bits, and then put them in a microwave-safe container along with a few tablespoons of water. Heat for about 30 seconds, or until the soap has melted, and stir to combine. If you want to add a shape to your soap, pour the mixture into muffin tins or a mold, and let stand. The soap will harden, and voilà—a brand-new bar!