The wiper arm (85221-0E050 ~$60) can be replaced in its entirety, I don't think OEM sells just the spring alone unless you go through some salvage yard or eBay...
Anyhow, in looking at your picture, those 2 spots looked to be with some sort of oily/waxy substance (or been polished), I would first scrape clean the area with a brand new razor blade then clean with windshield cleaner (i.e. Invisible Glass).
Anyhow, in looking at your picture, those 2 spots looked to be with some sort of oily/waxy substance (or been polished), I would first scrape clean the area with a brand new razor blade then clean with windshield cleaner (i.e. Invisible Glass).