I'm a new member here and I enjoy all the information I get from CL.

Here's my question:

The gridlines on the rear defogger on my car are flaking off. I tried fixing it and it seems to be working better now. I was looking into the cause of this and while driving with the radio on really loud I noticed how much the rear glass vibrates. Could this be the cause of my problem? Has anyone had this happened to them? Thanks for all the info.