The rear camera lens of the Xiaomi 14 Ultra is foggy

The protection level of the Xiaomi 14 Ultra reaches IP68. However, the inside of the phone is not a vacuum. Therefore, it can exchange gases inside and outside the phone. When the ambient temperature of the phone changes rapidly, a condensation effect will occur, resulting in fog on the lens. 
If fog occurs on the lens, you can solve this problem by referring to the following methods:
1. The fog will disappear naturally after leaving it for a few minutes at normal indoor temperature;
2. If you urgently need to use the camera function, you can dissipate it quickly through methods such as cleaning the lens with your palm.
If the issue remains unresolved, please contact our local official service center or your seller for further assistance. They will help you in this regard.
Note:
This situation is similar to the fog on spectacle lenses when entering from a cold outdoor to a warm indoor environment in winter. It is a normal physical phenomenon. Please do not worry too much. Thank you for your understanding.