Here’s where it gets gross and glorious. Grab a clean, clear glass. Fill it with tap water. Let it sit for 30 minutes on the counter. Now stare at it.
See tiny white flecks floating around? Those are likely tiny bits of plastic or mineral sediment. Not your eyeballs playing tricks. Water is basically a liquid soup of stuff we don’t see.
Pro tip: Shine a flashlight through the side. If your water looks like a disco ball of sparkly junk, you’ve got hard water (high calcium). Hard water is annoying for soap scum, but it won’t kill you. It’s just... crunchy.
