Hello! this is the first season we are using our new Woodstock Fireview stove. We love it but after burning it a few times, we now see a rainbow in a circle pattern in the corner of the glass. Woodstock said it's light reflecting on a protective film on the glass. That sounds like a fast answer. It's very annoying and blocks some of the view. Do you have any comments or advice? This just doesn't seem right. Thanks for your help.