Whether you’re cleaning your kitchen after a big meal or finishing a painting project, it can be tempting to pour just about anything liquid—or sometimes even solids—down the drain.

Wired spoke to 13-year-old Makenna Kelly, who makes ASMR videos for the 1.3 million subscribers to her "Life with MaK" channel. In some of her most-viewed videos, Kelly eats instant ramen noodles ...