(Also in Minneapolis)
Yes, winter is hard on bikes. Particularly because of salt, it's best to wash down your bike regularly, and that's not easy in the winter when you can't use an outdoor hose. The best alternative, which some friends have but I don't, is an indoor heated space such as a laundry room that has a floor drain. I have heard of people bringing their bikes into the shower, but I only have a stall shower and it's on the top floor, whereas the bikes enter and exit through the basement, so that isn't happening. I simply fill buckets of water and pour them over the bike outside my garage (but positioned so that the water doesn't coat my driveway and give me sheets of refreeze. Elsewhere somebody recommended a garden sprayer, like
this.