Help! My chickens are eating all the heir eggs.

My chickens started eating their eggs a couple of months ago. I’ve tried everything that I’ve read on the internet - fake eggs, checking for eggs often throughout the day, giving them oyster shells. I haven’t isolated the culprit because there’s more than one, maybe even all of them. I bought some roll away nest inserts, but they won’t lay their eggs on them. They go to the corner of their chicken house and lay there. By the time I get to them, there are only egg shells remaining. Is there any other method that has worked for someone else?