Dust in rear camera under the glass

I see no posts about this with the S6, so I am guessing it's rare. I went to take a pic this morning and noticed a dark spot showing up on the "view finder" (2 dark spots, as I later learned). I wiped the glass over the rear lens to make sure it was clean, but that didn't help. Sure enough, I have dust under the glass. I tried blowing it out with compressed air to no avail. I contemplated getting a replacement piece of glass for on eBay and just removing and cleaning it myself, but nahhhh. I am on day 82 of my "purchase", which was through Costco so it has 90 day no-hassle replacement/return, and was actually a free early upgrade promotion to a Droid Turbo that turned into an S6 after 2 bad Turbos (long story). Anyway, I just decided to replace it with a new S6 which luckily is still on OC3 so I can root and rom it (isn't the newest Verizon S6 firmware still not rooted?). As a bonus, the screen's color conformity on this S6 is definitely better than my last one. I could see green and pink hues on a white image pretty easily, but I can't really see green and pink hues at all with the new S6. Added bonus: 75 fewer days of usage on the battery.

Anyway, just wondering if anyone else has had this problem. For what it's worth, my old S6 camera glass was never quite right - one edge was higher than the rest, like it was tilted. With a couple cases that were supposed to protect the camera glass, mine still rubbed because it protruded out farther than the case. So I'm guessing dust got in due to an improperly installed piece of glass, but I was too lazy to try and fix it. Thank you, Costco, for your 3rd party cellular kiosk and 90 day replacement warranty!