Anybody else experience problems with Stan's not sealing in cold weather? I have gone out three times now in 30 degree weather. Two times I have had trouble with my rear tire going flat. From what I can tell I am rolling the tire and the sealant just does not want to seal. This same thing would happen in the summer but I would lose some air then everything would seal back up. I have added more sealant but it still happens. Just wondering if anyone else has experienced the samething. I might go back to tubes for the cold weather.