Melt wax in a large pot over low heat. If needed, break up wax into smaller chunks beforehand to lessen melting time.
Add in food colouring or a crayon to dye the wax if wanted.
Line up muffin liners in a muffin tin. Add in the cotton wick, using wick tabs and glue dots if wanted. These help to hold the wick in place, though the wick tab will not burn.
Pour melted wax into the liners until they're about 2/3 full.
Add in decorative elements, allowing the tops of the decorations to stick out of the wax. Adjust the wick placement if needed.
Allow the wax to cool fully. Light the wick to use your fire starter!