We always recommend hand washing our reusable cotton rounds with soap and warm water right away after each use, this will avoid stains setting in; hang them to dry.
You can also put your ecopads in the mesh laundry bag for an extra wash in the washing machine with your clothes and a gentle laundry powder then leave them to dry naturally. Don’t use any laundry softener or bleach when washing your reusable makeup remover pads.