The filter atop of the camera sensor is going to get those ugly dust spots, and at some point it will be bad enough that you will either,
Will start off,

Niels
- Do a wet cleaning, or
- Hire someone else to do the wet cleaning.
Will start off,
- Always point camera down.
- Do it in the bathroom.
- Do it in still air
- When out in the field, in the car w. the windows rolled up & fan not blowing.
Niels