Hmm. Perplexed, because I don't recall this issue with the oven previously. I don't have a pressure cooker (huge mistake among my total brewing-gear sell off years ago - getting rid of the 21 qt All-American), and have an issue getting the invert hot enough stovetop. I seem to make out in the low 220's. In the oven, weirdly, it's very difficult to achieve it either. I recall it being sluggish before but not this - it seems that no matter how hot I'm making the oven, it's not getting much past 222F. Am I missing something? Lid's on, fwiw.