My husband cut out a hole on a Cambro lid to fit Joule. Used it for the first time today, and realized I was not sure what to do with the Joule after the water was heated and I needed to put the jars in. I ended up having him hold it at an angle so it would have water going through it instead of running it dry. Is there a pause function? Is it Ok to just set it on the counter while you load your food in?