Spinning and casting reels can be adversely affected by the cold, too. A reel that is difficult to crank because the lubrication inside it is getting gunked up drastically reduces an angler's sense of feel. When you're dragging rigs and lures on the bottom or retrieving crankbaits, you need all the sensitivity you can get. Because fish aren't voracious eaters in winter, their strikes often take the form of what I call "pressure bites," and a half-frozen reel won't let you feel them. That said, if you do tweak your reels for better performance in cold weather, be prepared to maintain them after every fishing session or you'll experience serious parts wear.