Have you ever seen someone on TikTok sprinkle table salt in their toilet bowl before going to sleep? Right now, it’s a bit of a trend in home-hack circles. Just leave the salt in the bowl overnight, and by the next morning, your bathroom will be cleaner and fresher. But how much of it is real? A 2023 study published in the journal Microorganisms says plain salt doesn’t actually fight germs unless it’s at very high concentrations. That’s a lot of salt to be throwing on before bed.
Why is this hack spreading among millennials right now
Rent is expensive. Food costs more than it used to. A one-minute cleaning trick that's free is sure to catch on. Salt is already sitting in most American kitchens, so it feels like an easy win. No expensive products. No strong chemical odor. It’s just a little habit before you switch off the lights.
What is salt actually doing in the bowl overnight?
Table salt is a mild abrasive. Salt also counts as a mineral abrasive, according to the New Mexico State University Extension guide on home cleaning products. The same goes for baking soda and powdered borax. This means the salt's hard little crystals can be useful for breaking down light residue on the bowl. At night, no one flushes for hours. This gives the salt more time to work than it does during the day.
