Make sure wipe down the lens first. I have seen a smudge lens do this on the same camera.
Guys I have a "fog" problem as well. Please see the photo.
This instal was fine for the last couple nights but tonight I have a mysterious fog. It has rained all day and possibly this evening so I don't know whether it is due to moisture, inside or outside or what.
I did change SVC = off, Iframe from 50 to 15 and frame rate from 10 to 15 this afternoon.
Turning IR LED off looks clear with the IR off, obviously a bit dark but theres enough light to see the view is largely clear.
By default I've got Smart IR off, toggling that didn't make any difference.
I'm remote so I cant see if its moisture on the inside or outside, although turning IR off seems to indicate IR bleed , but confusing is the camera was ok at night for 4 nights.
It has been raining today .
I read else where ... about tightening uniform , and I remember I tightened probably one screw a time to loose on each screw and then tightened evenly around the screws for last bit.
Any ideas ??