Issue: The ringer on/off switch on my iPhone 6 was stuck/gummed up so I sprayed it with contact cleaner. I didn't think liquid could get in through that opening, but I was extremely dumb. iPhone was off, waited overnight before powering on. Major waterspotting on screen. Rice trick got rid of most of it, but some spots remain. iPhone works 100%, except my battery life took a nose dive after, surely related. I'm about to replace the battery (which I've done before; iPhone is way past warranty).
While I'm in there replacing the battery, how do I also fix this waterspot issue?
I was thinking I might be able to wipe the liquid spots off with alcohol after reaching steps 37-41 in this iFixit guide: https://www.ifixit.com/Guide/iPhone+6s+Front+Panel+Replacement/56283
Two pictures of current state here on GDrive. I could live with it: https://drive.google.com/file/d/1OnUqyyuLHVz2ahBBqVt2TLEsM13_VhyH/view?usp=sharing