IPC-HDW2231R-ZS and Rings in the image at night

trumee

Young grasshopper
Dec 2, 2016
33
4
Hello,

I get rings in the night on my IPC-HDW2231R-ZS. Initially, i thought it was due to a spider but that wasnt the case. During daytime the image is quite clear. Any idea what could be the issue?

1606147064056.png
 
That looks like IR reflections on something on the lens to me. Have you cleaned the lens recently?