I've found the easiest way of all: Save your soap scraps until you have a travel soap box container (hopefully a large one) full. Put them inside with a small amount of water, then put the open container in your microwave. Set it at a low speed or even defrost, then keep an eye on it as it heats. The bars will absorb the moisture and start to grow in size. Start and stop the microwave. When it seems to suit you, take a skewer or other long utensil and stir to mix. Then let it cool and push it down into the soap box to make a bar. Set it aside and let it cure for a few days. When it's no longer tacky, push it out of the box. You may need to use a small knife or skewer to score around the edges and loosen it from your mold. Now pop it out and you'll have a bar you can use to wash at the sink, tub, or shower.
When I have a lot of soap scraps saved up, I grate them on a coarse grater into a bowl. Then I add just enough water or liquid soap to make it stick together like clay. Once you have done this you take a handful of it and form it into one or more bars of soap. I make mine an oval shape. Let it dry afew days and then it is ready to use.
My former mother-in-law showed me how when she would get a really thin piece of soap left from a bar, she would wet the new bar and the small piece, while in the tub or shower, and stick them together firmly, then while still in the tub or shower, smooth the edges down all the way around the small piece of soap. You didn't get a new bar that way, but the small piece didn't go to waste either.
What is the easiest way to make a new bar of soap from all of my old soap scraps?
Tom from Homosassa, FL
After they are set up, pop the bars out of the molds. If they don't come out easily, stick them in the freezer for 4 hours or overnight, or until they feel dry when you touch them. Then they will pop out easily. Air dry them without their touching each other for 2-3 days. As Mammy Yokum would say, "Abber Ka Dabber." (03/13/2007)
By denise warner
How do I make a new bar of soap from left-overs?
By bennachie from Scotland
Or you can grate, put in an old plastic container, put 1/4 cup water for small amount, 1/2 cup water for more, put on lid and let slowly melt over a few weeks in a cupboard. When it's a gooey mess, heat slowly in a stainless pot, or glass bowl in microwave in 20 second bursts on maybe 40 percent power. Stir until it all looks the same, use a spatula to scrape into your "mold" and let dry for few days until it pops out easily. Stand on side somewhere out of way and let get really dry and hard.
Sounds like a pain, but it's good practice if you ever want to double process home made soap. Directions for different methods are on the web. If you double process soap, and let it dry for about 2 months it lasts so long you wouldn't believe it. Really. (09/23/2009)
How do you melt down and remold bars of soap?
By Vida from Amarillo, TX
How can you make soap from old soap and soap left overs from soap carving?
By Peter from Loscoe, Heanor, Derbyshire
Add your voice to the conversation. Click here to answer this question.