The Dyson Pure Humidify+Cool™ has a hassle-free deep clean cycle which cleans the machine thoroughly at the touch of a button. After approximately one month’s worth of humidification in hard water areas (you can select your water hardness on the Dyson Link app), the deep clean cycle button will illuminate alerting you that it’s time to run the cycle. The machine will also alert you when it’s time to change your filters. A filter life reading can be found on the LCD screen and via the Dyson Link app.