The floor of my Sierra Designs tent and the rainfly are very sticky. I've stored both loosely packed for about twelve years on a shelf in a closet close the the ceiling where heat gets trapped. It can get quite warm there at times, so I believe the heat has broken down the material over the years. I tried airing out the tent and rainfly in the sun and washing both in cold water with a mild detergent, but these made little difference. Is there anything I can do to rehabilitate them?