I don't know how to clean it myself but do you think it should be cleaned with less than 5k shutter count?
If you see the same dark spots in consecutive photos taken of the sky at f8 or smaller, then that’s dust on the sensor. When I first got my Canon 5Dc (back when it was new), I’d always get dust spots. I would regularly rocket blow, and occasionally wet sensor clean. With my 5D3, I’ve never seen a dust spot. IMO, the self cleaning features of the sensors are pretty good now. But if you do see a dust spec, it’s easily remedied by using a rocket blower.


