OK, so a bit of minor OCD is bugging me a bit. I know not to wash hatching eggs. But is there a best way to gently clean them off? I have some duck hatching eggs that are on the dirty side (I know ducks tend to have muddy feets and get 'em all over their eggs, so I know it is normal). I just want to clean them off a bit so I can better candle them when they are developing. I haven't popped them in the incubator yet, they're still settling. But I want to clean them before they go in.