We bought an oven liner before our Christmas party last year. After cooking all day for the party, our parrot Twyla (8 years old) seemed fine as people arrived. A couple hours later, however, her eyes were all "nonseeing" - she bit me for the first time in her life, and she was holding on to her cage with her beak for dear life. 20 minutes later she was dead and we had no idea why. I threw out the liner, and am heartbroken that something so innocent made my bird suffer and die.
However 3 days later we got a new grey, DaVinci, and replaced anything like oven liners, got new pots and pans, new cleaning products, etc...never again.