These are all good ideas. I think the plane sat a month or so. We do not really have winter around here. At the most, we can go a couple of weekends with bad weather.
One more thing. I mentioned the fuel jug was almost empty. Today, I held it against a light, and noticed that it was not clear (aside from the pink color). There is some stuff, not
like sediments, more like gunk sloshing around, and the pink is definitely darker than the pink in a new jug. I wonder if that is the culprit.
I guess they are right when they say one should not put unused fuel back from the tank into the jug....