Terrible photo trying to show the detail of the glass. Basically, it looks like hard water drops on my coworker’s windows but nothing he does (and nothing we tried during lunch) is able to make a difference. He has used multiple different glass cleaners, mixtures with vinegar, rags, microfibers, scratch resistant sponges, the little scrapey sides of sponges and more but to no avail. It’s actually pretty amazing.
The problem is that these marks, which you can actually feel the texture of when running your hand across them, trap moisture in the morning and make it almost impossible to see out of.