What to do when your chickens start eating their eggs

This was a first for me.
When I did my research, this is what I found.

1. Coat eggshells in mustard.
2. Coat eggshells in dishsoapy water
3. Put fake eggs in their nesting boxes
4. Give them crushed oyster shells
5. Collect eggs a lot more times a day

In the video I show you the results of all of these things and what I ended up doing in the end, which is to totally change the nesting box to the metal kind with an inclined box so the eggs roll so they can't access them and eat them.