Glitter face paint is the gift that keeps on giving—everywhere. If glitter is involved, use tape or a lint roller first to lift the loose sparkles before you touch any liquid. This prevents a glitter-soup situation in your washing machine.
Then treat the paint base as described above. Glitter is a microplastic, so try to catch it on tape rather than washing it down the drain. Your future self and the planet will thank you.
Fun fact: Glitter was invented in the 1930s by a machinist who accidentally created a tiny metallic cutout. Now it haunts every craft bin and festival field forever.
