I'm relatively new to making cholent. Before Shabbat starts I turn the temp down to around the warm area on the slow cooker. What I hadn't considered is whether it would boil or not. What happens is that most of the time it's still, but from time to time starts bubbling for a bit and stops.
My question is what counts as boiling on Shabbat? How do I stop this from happening if it counts as boiling?