Nike Asymmetrical Zipper Windbreaker

Perfect condition besides the zipper needs a little wiggling at the very bottom. I've never had it get completely stuck, but doesn't just zip effortlessly - don't think it's broken at all, just wanted to mention. Zips up completely fine, it's just the last maybe inch to inch and a half needs little wiggling to get the jacket fully open/unzipped. Not sure how to fix.