Rarely, that milky look comes from sediment, like tiny rock particles or minerals. That’s a different story. Sediment usually settles at the bottom of your glass, not clearing from the bottom up. And it often leaves a gritty feel on your tongue.
If you see a white powdery residue after the water evaporates, you might have hard water, which is high in calcium or magnesium. That’s not dangerous—many people actually prefer the taste—but it can cause limescale in your kettle. Not scary, just a little annoying.
But the most common culprit? Yep, air bubbles. And that’s honestly kind of cool. Your water is just breathing.
