Daily misting is recommended for indoor plants with only spare watering in winter. Numerous inventions have been developed to facilitate aeroponic spraying and misting. These fluids can be applied by spraying, misting, or flooding the workpiece. A misting fan is similar to a humidifier. Cooling is best accomplished with tepid water misting and cooling with a fan. Advertisements boasted free water fountains, ample restrooms, and misting tents. Misting "Heliamphora" with purified water is often beneficial to maintain high humidity levels. Water should be provided by gently misting the enclosure on a daily basis. One way to keep ferns moist is by misting them. Misting for a minute or two a day will keep a moss lawn green. A misting fan may be used outdoors, especially in a dry climate. Misting of the tank is recommended if the tank becomes dry. All cameras and their viewports were electrically heated to prevent misting and icing at altitude. The use of smoke hoods or misting systems was also examined. Kyoritsu followed that design with a backpack/blower/misting machine in 1955.