Humidifier white dust consists of mineral residue from water, primarily calcium and magnesium, which aerosolize during humidification. Ultrasonic humidifiers are the primary cause due to their misting process. Switching to distilled water, which lacks these minerals, effectively prevents white dust. Regular maintenance and cleaning are also essential to minimize buildup.

Mineral buildup is the silent killer of water based appliances. Those minerals in tap water leave hard scale behind, clog tiny passages, create white dust, and invite odors. Distilled water removes the minerals before they ever enter your device. The result is fewer breakdowns, cleaner performance, and longer life for humidifiers, steam irons, and CPAP…