Ya know.... I'll bet that's it, too, now that you mention it
I was told by several people that leaving those inflatable plastic lawn ornaments (so popular with my neighbors at Christmas time
) inflated all the time is better for them than deflating during the day and reinflating at night because of the freezing temperature's affect on plastic and the crinkling/stretching they go through. Same difference I'll bet moving around a 0 degree plastic bag in the freezer. That plastic has
to take some abuse.
Ahhh, I can sleep at night again