These images were taken by my security cameras. These are the same cameras during the day... what do I need to do to improve the nighttime images.

I've tried cleaning the lens, etc.

Cameras are Amcrest and are only three years old. They look like this

It isn't insects or spiders leaving trails on the dome is it?  Or would there be micro cracks/fissures in the dome itself which is leading to the highlighted areas during the night vision modes?

Sorry, I don't have these cameras, but is it possible to reseat the dome so the back is now at the front etc?  A bit light a tear off strip on goggles or sports cars windscreens etc. (or if it is the dome, can they be replaced?)  Is it possible to test it without the dome?

On my cameras I've had, I've had spiders building webs around or near the lens, sometimes on cases or mounts I have had, but I've not had a camera with a dome, so unsure whether this might cause issues during a NV type mode.

On the North camera, it looks like it is blurred in the same place as it is during the evening - just thinking again whether it is the dome thing if you've cleaned the lens etc.

Yann

its the IR light hitting dust/condensation on the dome and lighting it up. either need an external IR light source or different cameras.

that is why i would never by a dome camera for outside.

^ this.

This any use? 

https://support.amcrest.com/hc/en-us/articles/360007547231-Night-Time-Reflection-Issues-

Or this?

https://www.youtube.com/watch?v=H1zecONedT8

I had the same problem in another brand of dome camera.  Ended up being condensation.
I purchased a few of those little condensation absorbing sachets and managed to squeeze them in around the circuit board.

Problem then went away for a few months, until I needed to replace them.

magnetonz:

I had the same problem in another brand of dome camera.  Ended up being condensation.
I purchased a few of those little condensation absorbing sachets and managed to squeeze them in around the circuit board.

Problem then went away for a few months, until I needed to replace them.

rogercruse:

 

 

 

 

Please also adjust that driveway camera!

The bin isn't worth it!

rogercruse:

 

These images were taken by my security cameras. These are the same cameras during the day... what do I need to do to improve the nighttime images.

 

 

 

I've tried cleaning the lens, etc.

 

 

 

Those examples are almost identical to issues I was having, I'd tried cleaning them etc. and thought they were clean, but in the end I really had to take to the dome with a rag to polish it up.

If you get up close can you see what the blemish on the North daytime picture is? It looks bad enough that you might be able to see discolouration or condensation? In my case I think it was baked on spiders web.