A steam cleaner is a versatile cleaning appliance that uses **pressurized, high-temperature steam** to deep-clean and sanitize a variety of surfaces without the need for harsh chemicals. By heating water to boiling point, the device releases a powerful jet of dry vapor that effectively dissolves stubborn grease, lifts grime, and kills up to **99.9% of bacteria, allergens, and dust mites**. It is commonly used on sealed hard floors, grout, upholstery, and even windows, offering an eco-friendly solution that leaves surfaces dry within minutes and improves overall indoor air hygiene.