Allow me to take the "Don't store it wet" advice one step further. I stored one I thought was dry, but was apparently still just damp enough to cause problems, and it now has permanent mildew stains. The mildew is dead and the tent doesn't leak, fortunately. It's been thoroughly washed with a tech. wash, but it still looks terrible. I now hang it in my carport every time I use it and don't pack it away until dry weather.