I've got a pop door that we use an outside rope to pull to open (an idea I stole from a YouTube video - you can see it in the lower left portion of my avatar picture) so that we can let them in and out without going into the coop/run. With freezing, however, the wood is getting stuck with ice, and we've had to go in and force it open. A little research has told me that using some cooking spray (olive oil) will keep the ice at bay. Has anyone had experience with this and maybe has a different idea of how to keep things like latches and sliding components from freezing up? We rarely get colder than the low 20's, so that could be useful info.