@Joeblow,
To what do you attribute the change in attitude and do I believe it this time? I have found that if I can muster enough patience over time, and if I am concision and calm and reasonable, she will sometimes come around.
I can usually tell when this has happened because there is a change in her body posture and vocal timbre; however Mrs Chumly might well see this more as some sort of defeat and loss of control. Although if my insight is correct, I doubt she would admit this to herself, or even necessarily know it conceptually, and thus it would be on an emotional level and not an intellectual level.
This is also supported by her often touting "I am never intentionally mean to you" although interestingly she often asks me to apologize for things I would suggest are of her making and not mine, and when challenged she finds little if anything to substantiate my need of an apology. This was exactly the case with respect to the cooking smells and the fact that she did not open any of the doors and only two windows.
Going a step further in this thought process, one of her "tactics" is to try and escalate and obfuscate the basic consideration to the point where I loose my patience and then demand an apology and claim I am acting as poorly as she is and thus equally to "blame".
Thus is takes Mega-Patience to deal with basic concerns involving Mrs. Chumly as things take much longer and try my mettle much more than I would think needed. In that sense she reminds me of a child as that's a common enough tactic for kids.
Yes I have brought exactly this thought process about her "tactics" to her attention many times, and most often at first she says she claims she has no clear understanding/recollection of the circumstances as I would describe them. However if I take careful notes and wait a few days until she has calmed down, I can talk to her and explain it to her and she will say something like "I see how you might think that, so I will try harder in the future". However if I bring this up there is also a good chance that she will consider this a criticism and controlling and will harbor resentment even if she agrees that she should be more considerate.