Newest units (which include all of the types we analyzed) have a light that could remind you to do this right after each individual 250 hours of use. Most WiFi-linked ACs will send out you a cleaning reminder in the application as well. Good thermostats like our pick, the Ecobee https://madbookmarks.com/story18576896/the-smart-trick-of-how-to-clean-air-conditioners-that-no-one-is-discussing