Cancel time-remaining if you quit cooking early. Leaving 12 seconds on the clock won't fly with OCD types, surely? If you wanted a minimalist microwave though,

Cancel time-remaining if you quit cooking early. Leaving 12 seconds on the clock won't fly with OCD types, surely? If you wanted a minimalist microwave though, you could have it reset each time the door is opened or after a minute or two of inactivity.