Write about that today. What would disappear? Why won’t you miss it?
Maybe you’ll describe things that are tangible and straightforward, like the grime behind the kitchen faucet or the dirt under your nails.
Maybe you’d rather wash away the intangible: regrets, memories, emotions, past events.
Fill a page with such thoughts. Include decoration or illustration if you like. Give your work a title. Add a signature and the date.