Just open the camera module and remove the o-ring. This prevents moisture from being trapped inside the camera and completely fixes the issue. I've done this years ago and everything is working perfectly fine, even after flying hundreds of km in tropical conditions.
sir thank you you gave me the idea ............but i modified it a bit.... i remove the protective glass then glued it to the removable "cover"........ almost all the tricks i saw did not improve the foggy problem only this...... i believe that its not the imbalance in temp or just the condensation..... my drone was in house room temp (30celcius) still its fogging.... im sure theres a heat problem inside the camera....... i will update the longevity of my modification
THe DJI service center is changing the camera module bcoz newer version has heating element inside which prevents the fog build up in humid condition, if one lives in a country where DJI is officially available that is the best solution by getting it replaced.
Image transmission signal may be blocked. Position remote controller to face aircraft and adjust antennas for optimal signal strength or fly at higher altitude Ye error ha raha mere drone me fly karte time dji.mini 2 SE