Wash and dry your cotton fabric, then preheat an iron to the hottest setting, usually the cotton setting and iron the fabric.
Cut the fabric to desired size.
Lay a folded towel on a flat surface, then a piece of parchment paper over top and sprinkle 1-2 tbs of beeswax and 1 tsp jojoba oil (optional) onto the fabric.
Add another piece of parchment paper on top of the fabric, then press the iron on top of the parchment paper for 5-10 seconds to melt the beeswax, then move to another spot on the fabric. Repeat until all the beeswax is melted and the entire sheet of fabric is covered in beeswax.
Carefully remove the top piece of parchment paper and peel the fabric from the bottom piece of parchment paper.
Wave the fabric back and forth for 10-15 seconds until the beeswax has cooled completely, then use pinking shears (optional) to cut around the edges to prevent the fabric from fraying. Then it's ready for use!