Why does the Redmi Note 14 Pro 5G have a water mist problem?

The Redmi Note 14 Pro 5G has an IP68 dust and water resistant rating. Fogging is not caused by water entering the inside of the phone.
However, there is no vacuum inside the mobile phone and the air cannot be completely isolated. In some scenarios, when the external temperature of the mobile phone drops sharply or the temperature difference between the inside and outside of the mobile phone is large, it may cause condensation of water vapor inside the mobile phone, thus causing the fogging on the lenses, which is similar to the fogging on spectacle lenses when entering from a cold outdoors to a warm indoors in winter. It is a normal physical phenomenon, so please don’t worry too much. After placing it in a stable environment for a period of time, the fog will disappear naturally. You can also remove the SIM card tray from the phone and place it in a closed dry environment, such as a sealed bag with desiccant. If you need to use the camera function urgently, you can use your fingers or palms to touch the lens to restore the temperature to make it dissipate quickly.
The time when the water mist appears depends on the time when the temperature difference occurs and when the temperature difference between the inside and outside of the machine disappears, which will be different in different scenarios. The water mist can usually dissipate quickly if the external temperature of the lens rises (such as wiping the lens quickly) or moving to a ventilated and dry area. If the water mist does not disappear for a long time, you can seek help from a nearby after-sales agency. As the usage time increases, this phenomenon will generally no longer occur under normal usage scenarios.
Common scenarios that easily trigger water vapor or water mist are as follows:
1. Aim the air conditioner blower during the mobile phone navigation process;
2. Use in shower room scene;
3. Place the mobile phone on the surface of frozen objects, etc.;
4. Take out underwear from your underwear to the outside cold environment in a cold environment.