I use dry nail brushes to dust off heavy dirt when needed for setting eggs. Works well, and doesnt weaken the shell.
i would set those duck eggs that are arriving today once they have warmed to room temp (assuming they arrive cool to the touch), i dont turn shipped eggs for 24 hours, then just turn as normal. ducks are very slow to hatch unlike quail and chickens. once they start pipping they can take 3 days to finish hatching. They also need to have good moisture loss during incubation to enlarge the aircell and prep for a good hatch. we run a very high hatch rate around here on our eggs. if you run into issues feel free to PM if I miss the question here. happy to answer as much as I can.
i would set those duck eggs that are arriving today once they have warmed to room temp (assuming they arrive cool to the touch), i dont turn shipped eggs for 24 hours, then just turn as normal. ducks are very slow to hatch unlike quail and chickens. once they start pipping they can take 3 days to finish hatching. They also need to have good moisture loss during incubation to enlarge the aircell and prep for a good hatch. we run a very high hatch rate around here on our eggs. if you run into issues feel free to PM if I miss the question here. happy to answer as much as I can.