on any drone the gimbal and camera are the parts that are most prone to damage, and over many flights,bits of debris can become lodged in the moving parts of the gimbal ,and these will cause issues with the smooth operation of the gimbal and camera
as part of your maintenance schedule, use an air puffer to gently blow such particles out of the stepper motor housings or you could use one of those micro vacuums that are used for computers
as part of your maintenance schedule, use an air puffer to gently blow such particles out of the stepper motor housings or you could use one of those micro vacuums that are used for computers