Quote Originally Posted by wilomn View Post
Take a soldering iron, 1/8 inch in diameter, and enlarge the holes.
I don't have much experience, but the fumes could be from the soldering iron. It should go away with time, but since it's the smell lingering in the cage and not burning plastic then it probably isn't harming it. I recommend cleaning the lid with rubbing alcohol then water to try to rid it of the smell.