In reading thru the 'Cover bike or not' thread, I decided covering my bike would be a very good thing. I would be interested in knowing what cover you use.
I use the breathable indoor HD cover. Only use it during the winter months and still remove and check every 10 days or so. Don't want to take a chance on moisture. It's supposed to be "breathable, but you never know....
In my garage it's uncovered. If I travel I cover it with a cheap $20 Walmart cover. When it gets all screwed up I just buy another. I do this to keep people from knowing it's a HARLEY sitting outside my motel room. And they are pretty good covers for the money.
I use HD indoor breathable cover only during winter. I will check it every couple weeks. When the weather gets damp and rainy and upper 30's low 40's the bike will sweat. I'll remove the cover for a few days until it gets cold again. Even with a breathable cover it'll sweat in those conditions. If your bike will be in heated storage no need to worry about moisture.