Fly Spray? Yikes!
I strongly urge you to find a way to prevent her from doing this. I'd even call the health department. That stuff she is planning on using is TOXIC and lingers for quite a while. I would not subject my own person to that stuff. Some people are sensitive to it and get sick when exposed to it (I am one of those who can not even walk down the pesticide isle at the hardware store without becoming ill). Chams are very sensitive to those chemicals. Their lungs are very fragile. They are not like people, dog or cat lungs. They are like thin sacs. Birds have a similar lung structure. That's why respiratory issues are often deadly. Their lungs don't heal well like ours do. I have a friend who moved into a home that had been sprayed for pests. She couldn't figure out why the crickets she was feeding her chams were dying in the chameleon cages. Then she lost a couple of chams. Her vet told her it was the pest spray. It had been a month since the place had been sprayed. She had to wash all her walls and get the carpet cleaned thoroughly. The stuff you buy yourself is even more toxic and, surprisingly, less regulated. Yikes is right!