I had PGT Win Guard windows installed in our house...

I had PGT Win Guard windows installed in our house in 2006. Within a year or two a few windows developed a fog-like film. I eventually decided to have those windows repaired. I called PGT several times to inquire if I had any warranty protection. I had to call several times because the first time, I was left on hold for 30 minutes. The second time I left a message on an answering machine that went unreturned. The third time I finally reached a rep, who clearly had an attitude. He pulled out all the normal tricks for weaseling out of a warranty, do you have your receipt? etc. They clearly know this problem with their windows extends beyond my case, but they seemingly have no interest in resolving it. We'll have to hire our own glass firm. I would rate the PGT customer service experience as miserable and wish that I had chosen another brand.