[SCSIfloppy]

With something that's poison, reducing your intake just a bit is probably the best thing you can do. We know about vapor and outgassing and how temperature affects this. You don't need "sources" just a basic high school level understanding of chemistry to understand these things. I don't need a source to tell me water boils.

There are reams of information out there about how age affects plastics, and how. It's all based on basic chemistry.