Mark on lens at night

Hi :wave: new here just a question really

I have a ring doorbell plus it’s set up no problem but at night there is this curve mark on the lens this is only at night and just wondering if anyone else has this? Is it normal? Thanks any help would be appreciated
I have a snapshot but can’t attach somehow

Just uploaded at screenshot as to what I mean hope you can see it

Hi @user67188LOU. If that curve mark shows up on all your videos during the night, it is not normal. It looks like it could be something on the lens. I recommend cleaning your lens with a soft cloth to see if it helps. If not, give our support team a call for further assistance.