I have an idea. Mabye this is evil, I don't know.

First, talk to your kids and make them part of the plan. Tell them that it isn't righ tof his to leave notes like that, and it's everyone's job to help out. Make a big chore chart and put it where everyone can see. Put yourself, your kids, and your mom and him on there, too. And then every week is someone's week to do dishes every night. Someone to pick up the living room. Etc. etc. Then, you and your kids follow along to the chart and see what happens when it's his turn....