Our ducks are good about laying them in the nesting box or coop 95% of the time. The other 5% are laid in the pool.
What is your nest set up? I hope to have a duck house twice the size as now, enough room for duck bed, food, water, and I was thinking of one of those nest boxes made from a framed bottom. What size too? I really suspect that ducks need one not too small or large or with shallow/deep sides. I put mine in their pen about dark then put them into their house and lock it when I go to bed. The have a 4W night light (LED) that I have been turning off around midnight. I turn it back on about 6 when I let them out of their house and at 7 they go to the yard. All water including the tub is changed out about every 4th day or so. Because they are playing with flying around, they go into a 6' all grass small back yard when I leave the house. Trying to spoil them so that they will spoil my husband (he thinks he will eat all the eggs two ducks produce)