Your humidifier is not picky because it is fancy. It’s picky because minerals break it. A broken humidifier means dry air and a grumpy you.
So here is the cheat sheet: Distilled water is king. Filtered water is a solid knight. Tap water is the court jester who knocks over the furniture.
Do yourself a favor. Spend the extra dollar on the blue jug. Your lungs, your skin, and your tired nightstand will thank you.
And you know what? You deserve air that feels like a gentle hug, not a dust storm. Go get that good water.