or scrub particular metal surfaces.
Because aluminum participates in some chemical reactions, it isn’t difficult to see how someone might assume that a ball of foil could help remove rust or mineral buildup inside a toilet tank.
Social media also rewards ideas that look surprising and promise immediate results. A quick video showing someone dropping foil into a tank is easy to film, easy to share, and intriguing enough to make viewers curious.
But there’s a catch.
A material that works for one cleaning task doesn’t automatically work in another.
