Re using bottled water. The reason for distilled water is minerals in tap water become concentrated and deposited on the water reservoir and tubing. Some bottled waters have added minerals. If you use bottled water in place of distilled or demineralized water be aware of using bottled water.
I don't know if the following is fake news or is still current, but all news isn't without a factual basis:
Popular bottled water brand Dasani, for example, lists magnesium
sulfate, potassium chloride, and salt alongside purified water on its
Nutrition Facts label. SmartWater contains calcium chloride, magnesium
chloride, and potassium bicarbonate. Nestle Pure Life’s list includes
calcium chloride, sodium bicarbonate, and magnesium sulfate. And these
are just a few brands. Bottled water companies are purifying water,
but then they’re adding extra ingredients back.