To make soap from leftover bars, gather soap scraps, and use a cheese grater to grate them into a large bowl. Add a small amount of warm water to the soap shreds to make them malleable. Form the soap into the desired shapes, and let them dry for two weeks.
- Gather and grate the soap scraps
Collect the leftover bars of soap, and use a cheese grater to grate the dry pieces of soap into a large bowl or container. Soft or wet pieces of soap must dry out before you attempt to grate them.
- Add warm water
Add a small amount of warm water to the soap shreds, and knead the soap and water together to form a large malleable chunk of soap. Gradually add more warm water as needed to soften the soap and help it stick together.
- Shape and dry the soap
Separate the soap into pieces, and form the soap into the desired shapes. Alternatively, flatten the soap on a surface, and use a knife or pizza cutter to cut the soap into shapes. Place the soap on a piece of parchment paper in a well-ventilated area. Leave the soap to completely dry for about two weeks.