As Lavoisier's Law of Conservation of Mass spells: matter cannot be created nor destroyed, although it may change form.
The same thing goes for candlemaking and its main ingredient: wax.
pretty much every single time, at the end of a project, you will have, at the bottom of your melting or pouring pot, a small wax (or lots of it), colored or not, scented or not, with or without additives...
Should you throw away these leftovers? Of course not. Many alternatives are available, depending on the quantity of wax.
Let's have a look at these alternatives...