A large tupperware food storage container was inside of the oven, on the bottom, when the oven was turned on. It melted. Although it probably would have been easier to clean if it had been left to cool as a large mass, it seemed to be a good idea at the time to use a spatula and get as much of it out as possible while still relatively molten. Now there is a thin layer of plastic on the bottom panel. I can get most of it off with a razor scraper. Is there a solvent that will get off the rest? What about using the self-cleaning function, which somehow doesn't seem like such a good idea given the nature of the fumes. I could bite the bullet and get a new one, but it's ~$75. Any thoughts?

Hello, for the past year since my wife & I have been at our new home (believe it was built in the 1960s, a brick house), we've come down with respiratory issues. I believe there's some source of dust or fibrous material that's causing it but no matter how much we clean, we can't get rid of it. If I turn off the heat or A/C (symptoms are year-round), and use a wet rag to wipe up settling dust, there'll be a gray/black layer of dirt but looking closely, it looks like they're tiny fibers. We see this same stuff in thick layers when we clean out the exhaust fan in the bathroom, so it's in the air. We do have forced air heat, and the air filters are changed every other month. I'm sure people will say make sure we vacuum regularly, but we do, almost every other day. We dust weekly. My question is: 1) What can we do to identify where this stuff is coming from? 2) What can we do to get rid of it? We don't have pets or kids, and both of us are gone during the day. The only time we don't have health issues is when the heat/AC is off and the windows are open. Once closed up, it's like this stuff is just recirculated or regenerated or something. Help!