Camera fogging up

Brought my camera last summer. So this is my first real cold spell. I have the same issue with my 12 off 2c pro units for the last few days whilst if become cold -2 Celsius. They become moist on the front of the camera and all footage is un viewable. Cure is to wipe them but that is clearly

showing the flaw of these units. Awaiting reply that makes sense from Eufy. How can security cameras be sold that can’t see when it’s cold !!!