Weird blob around image when cooling

[Mattm45]

When live stacking an image lately, ( while using my 405cc cooled camera) it has been showing this weird blob. Kinda looks like a dust spout but it’s big. I checked the camera lens and see it on there aswell. Is something wrong with my camera? I’m cooling it to -10. Would taking flats remove this? It’s just weird that I saw it on my camera lens aswell.

[Menno555]

If it's only there while cooling, it's most likely ice or dew forming on the sensor or protective window. Unlike Zwo cameras, your camera has no desiccant tablets to take in moisture.
There are two thing you can do.
1) Cool your camera slowly. Lets say the starting temperature is 15 degrees Celsius. Cool down with steps of 5 degrees Celsius and wait like 5 minutes between each step. This way the atmosphere in the sensor chamber settles more easily, making the forming of any dew/ice more difficult.

2) You can follow this from the manual of your camera.

Dry Camera CMOS Chamber
The CMOS sensor is located in the CMOS chamber. There is a hole on the side of the front of the camera. If moisture in the CMOS chamber fogs the sensor glass, you can dry it by connecting a silicone tube through this hole. Please put an effective silica gel desiccant in the silica gel stick and make sure that there is cotton inside to prevent silica gel from entering the CMOS chamber.

Prevent Fogging of Optical Windows in CMOS Sealed Chamber
If the ambient humidity is very high, the optical window of the CMOS sealed chamber may have condensation problems. The camera has a built-in heating plate that heats the sensor to prevent fogging. In most cases, its effect is very noticeable. If the fogging problem persists, please try the following methods:
1. Avoid the camera facing the ground. Cold air is denser than hot air. If the camera is facing down, it will be easier for the cold air to come into contact with the glass and cause it to cool and fog.
2. Increase the temperature of the CMOS sensor. You can raise the temperature of the CMOS sensor a little to prevent glass fogging.
3. Check whether the heating plate is working. If the heating plate is not working, the glass will be very easy to fog up. Under normal circumstances, the
temperature of the heating plate can reach 65-70°C under the environment of 25°C. If it does not reach this temperature, it is possible that the heating plate is damaged and you can contact us to replace the heating plate.

[Mattm45]

Oh okay I will try to cool it more slowly. I have been cooling down by 5 degrees each time but I haven’t been waiting 5 minutes before cooling some more. I will try that thank you!