Helps reduce white dust, which is a byproduct of minerals caused by hard water. Crane Humidifier Filters also feature Antimicrobial Material to help reduce mold and bacteria growth. For best results, replace filter after every 30-40 fillings or every 1-2 months under normal use, or when the humidifier has not been operated for an extended period of time. To install, simply replace tank cap with filter and insert into full water tank. Fits most Crane Humidifier Styles including Adorables, Drops, Droplets, Smart Drops, and Warm Mists. REDUCE WHITE DUST: You may notice white dust mineral deposits on surfaces or furniture the humidifier mist is landing on. Crane’s demineralization filter cartridge reduces white dust from hard water with a high mineral content. LONG LASTING: The demineralization filter is long lasting and durable. Each cartridge lasts for 1-2 months or 30-40 - 1 gallon tank fillings. The cartridge only requires a quick 30 minute soak prior to its initial use. CLEAN CONTROL: This humidifier filter is made with clean control anti-microbial material which reduces mold and bacteria growth by up to 99.96% which helps extend the life of both the cartridge and humidifier. FITS MOST CRANE HUMIDIFIER STYLES: Crane’s demineralization humidifier filter is compatible with most of Crane’s humidifiers including Adorables, Drops, Droplets, smartDrops, and Warm Mist humidifiers EE-5202. EXTENDED HUMIDIFIER LIFE: Without the presence of mineral rich white dust the lifetime of your humidifier will be extended and the humidifier will operate with increased performance.