Humidifier produces white dust on nearby surfaces.

Steps:

• Use distilled or demineralized water: Switch from hard tap water to distilled water to eliminate mineral dust.
• Install demineralization cartridge: If your Sharp model supports it, install a demineralization cartridge in the tank.
• Clean transducer and tank: Regularly descale the transducer and clean the tank with white vinegar and water.

This is not a mechanical failure but a water quality issue; changing water type is the primary solution.