I leave my machine on to do routine cleaning but always have it plugged into a battery generator/surge protector (which I bought for my Tiara but use for all machines now) in case the power flickers, albeit rare. (We live in the country and have an electric co-op). I believe it will stay on for 6 minutes, but our generator will kick on before then. I unplug when I am done with that machine or at the end of the day.