Defrosters are devices used in vehicles to remove ice, frost, or condensation from the windows. They work by blowing warm air onto the glass surfaces, helping to improve visibility during cold weather. Most cars have front and rear defrosters, which are activated by the vehicle's heating system. In addition to vehicles, defrosters can also be found in household appliances like refrigerators and freezers. These appliances use defrosting mechanisms to prevent ice buildup, ensuring efficient operation. Regular maintenance of defrosters is important for optimal performance and safety.