Thanks for your suggestions. I ended up taking out all the safety pins and flipping it over and starting again with the backing. I gently smoothed it from the center out. Had to lift it on all sides and then work it out to the edges.
The good thing is that it will stay there while I pin it again!
I didn't have any anti-cling or static spray or I would have tried that. I considered using a spray solution of Downey and water, but decided to try that next if this disn't work.