Came here to mention this. The whole video is worth watching, but the short version is that some machines have a sensor that detects when steam releases from the bag and automatically stops then.
The problem is that there might be a difference of a few seconds depending on which way the popcorn bag is facing when it pops open. So you should still listen for when the popping slows down.
This is a great explainer on that topic. Turns out some are fine but most of them are just garbage which is why the warning
https://m.youtube.com/watch?v=Limpr1L8Pss
Came here to mention this. The whole video is worth watching, but the short version is that some machines have a sensor that detects when steam releases from the bag and automatically stops then.
The problem is that there might be a difference of a few seconds depending on which way the popcorn bag is facing when it pops open. So you should still listen for when the popping slows down.
I use an app called popcorn expert from the old site I think that hears the popcorn pop and lets me know when to stop the microwave, nvr burned it