If you use a CPAP machine for sleep apnea, please don’t use purified water. The manufacturer’s manual is basically a restraining order against anything but distilled. Why? Because those leftover minerals can turn your humidifier chamber into a geological exhibit.
Worse, bacteria can still hitch a ride in purified water. Distillation kills them dead—like a hot steam roller of death. Purified water might only give them a mild sunburn. You don’t want bacterial salsa growing in your mask while you sleep, do you?
Fun fact: distilled water is also used in lead-acid car batteries. If you pour purified water in there, the minerals can short-circuit the plates. Your car won’t explode, but it’ll give you a look of betrayal—like a golden retriever you forgot to feed.
Purified Water vs Distilled Water, Which is Better?
When it’s okay to cheat (shh)
For steam irons and humidifiers, you can get away with purified water most of the time. But be warned: it’ll shorten the appliance’s life by about 15%—which is like eating a candy bar and then blaming the dentist. Just clean the mineral deposits with vinegar every month, and you’ll be fine.
For drinking? Honestly, do whatever. Purified water tastes fine, distilled water tastes like the soul of a rain cloud. If you’re not a fish or a lab experiment, your kidneys won’t care. Your taste buds might though—distilled can be flat, so add a pinch of salt if you’re fancy.
Surprising fact: Distilled water can actually leach minerals from your body if you drink gallons of it daily. That’s why astronauts don’t chug it—they add electrolytes. You’re not an astronaut, so don’t worry unless you plan a Mars mission next Tuesday.
