My mom lives in a senior apt. and says the upstairs neighbor is spraying raid or a chemical and an odor coming to her apt. What do you guys think?

My mom is a 72-yr-old dependent. She goes to the store, walking, to the bank or takes the bus the around corner from her home. She has diabetes and high blood pressure. It's been a year that once a week she calls me at 1am crying that the upstairs neighbor is spraying raid or a chemical on second floor and the odor is coming to her apt thru the sprinkler or lights causing her to not be able to breathe. My sister did go once to check and said it did smell bad. She open the windows for air to come in. I feel like she's the one that is spraying because she has air fresheners for the odor. 3 weeks ago she called me again, I went and didn't smell anything. She called me this week today at 1:30am crying that she called the cops because the smell was so bad she wanted to throw up. The cops didn't smell anything. I don't know what to do. She's smart and independent. She doesn't want to live with me or my sister and she says she's happy there. It is just the smell that is bothering her. She wants to move to another apt, which I relayed to the manager, but there's none available at the moment. I feel like she's the one spraying it. She will call me at night and tell me there are men breaking into cars because she has a view to the parking lot, but the alarms don't go off and she says they go inside the apts and that she could hear them slam the door. I didn't believe her, but someone called the cops and caught 3 dudes going into cars... So what do you guys think?