I am having a very similar issue at the moment with a nurse who is a bully and that's being polite. I am cleaner that cleans the reception and back staff areas of a medical clinic during the early afternoon. It can get incredibly hot and stuffy with wearing masks especially when you combine this with doing a physical job and menopausal hot flushes.
During the Winter it is a lot worse- central heating is left on max the entire day which is understandable for patient areas like the reception and clinic. For the back area it is unnecessary. Most staff only fleetingly pass through for brief toilet/drink stops between their early morning and lunch breaks. As it is this area has little ventilation and rooms which do have windows are rarely opened by them unless it's the height of a Summer heat wave despite peaks of Covid, flu or norovirus. If I am ill from one of those I can't go in to work and with no sick pay my bills don't get paid.
Cleaning the staff kitchen (way before their lunch breaks) is one of the few times during my shift I can get some respite of decent air quality and not feel fatigued in an otherwise humid building. I automatically open the windows after emptying rubbish to air the room and occasionally need to turn the radiator down before I return a short while later to finish cleaning it. Having hyperosmia (hypersensitive sense of smell) I need to do this to reduce lingering smells of rubbish, food/cooking, body odour and damp caused by inadequate plumbing issues that have rotted the inside of kitchen units which will never be replaced.
I dread it if said nurse pops in the staff kitchen for one of her many vaping breaks if I am in the middle of cleaning it or airing it before I return. Or the odd occasional times I've turned the heating down a notch. She takes issue (one of many) with the fact it leaves the room cold and has even gone as far as pinning out a passive aggressive note on the window. If anyone's wondering she leaves a cardigan permanently attached to 'her kitchen chair' as well.
God forbid if I forget to close the two windows after due to my increased workload with no extra time or pay and she/or another staff member have to close them. There is no compassion over my working conditions from her. Her solution during one of her many rants yesterday was to leave the back door propped open instead (as she does when vaping). This isn't practical and creates a security issue with anyone being able to wander in as I air the room first which seemed to bypass her. I politely pointed out the radiator didn't need to be on max all day either which was wasting heat and got snapped at 'What's it to you?- you don't pay the bills'. I dare say she'd of probably done her best to get me sacked if I'd retaliated with the fact that in today's current climate all homes and businesses are supposed to be doing their bit to conserve energy!
I have remained polite and professional to her throughout many years of her verbal abuse over petty things or beyond my control, humiliation, being talked down to or falsely accused. The fact that I go above and beyond in this workplace due to staff shortages of cleaners and at times HCA/nursing staff is lost on her. The majority of the other staff are lovely as are the patients but she makes me feel like utter crap. I've lost count of the number of times I've broke down crying after or suffered panic attacks if she's on a shift after one of her latest verbal attacks.
The frustrating thing is I am not the only one who has been on the receiving end of her vitrol- most cleaners and health care assistants have, even patients. Previous staff nurses have even resigned partially due to her bullying. Despite going to the clinic manager with complaints her 'good behaviour' rarely lasts long. Due to her longevity and ongoing nurse shortages she knows she can get away with it, especially with staff she considers 'beneath her'.
To the O.P, though you are probably nothing like the staff member that I have to deal with and it is totally different work environments I tell you my story in the hope that you see things from a cleaners perspective. It doesn't matter whether it is a covid issue or something else- please show some compassion and understanding. Good cleaners are hard to find and keep hold of.