Apple Watch 3 series gps side squares on screen?

I have had my Apple Watch 3 (gps only) for about 3 days now and I noticed that the side of the screen starts to show some squares like if it’s reaction to body heat or sweat, etc. If I breath out on the screen It shows all those squares even more evidently (on the side of the screen). It usually goes way when I’m not wearing it, but it stays there and doesn’t wipe off while it’s been worn. I’m not sure of exactly what it is. Is anybody else experiencing this?

It does not look like the little lines previously noted as a defect back in October 2017. I was told by Apple to take my watch back to the place I bought it from and get a new one there.

Please see photo. Any thought? At first, I was worried that maybe my Watch is not fully sealed, but it might be a reaction of external factors on the screen, like my sweat or body heat. Either way, I don’t think this is normal. I just hope when I exchange it that the other one won’t do the same thing.