Wiper problems

Can't figure this one out. My windshield wipers have worked great, better than any other vehicle I have been in. However, I just did a road trip in the rain and something strange started happening after using the wipers for about 2 hours. They started to jump across the windshield and rubber was coming off the wipers and sticking to the windshield. I had these black streaks all over the windshield like the wipers were disentegrating. I didn't let the wipers run over a dry windshield for any long period of time. In fact, it was pouring when this started.

I went to Capitol Cadillac in Marietta, GA and bought a pair of premium wiper blades as replacements. The old blades didn't look bad and they were only 6 months old. So, I put the new blades on, got the rubber off the windshield with adhesive remover, and wiped it down with Windex afterwards. I headed back to D.C. in the rain and after about 3 hours they started sticking to the windshield again! :banghead:

This is really annoying and I spent $56 for these "premium" wiper blades. My windshield doesn't appear to have anything on it. Has anyone else had a problem similar to this?

OUT
John
2003 Escalade, 27K miles