Do you have to wash mushrooms before cooking? No. You have to wipe them. Like a polite person. Or a mushroom sommelier. You are now a mushroom sommelier. Congratulations.
Go forth. Cook. Eat. And when someone at a dinner party asks about washing mushrooms, you can say, “Actually…” and blow their minds. You’re welcome.
Now pass the butter. We’ve got some dry mushrooms to fry.