Well, your job should be keeping up on the dishes, so maybe this isn't of use, but it's a good one.
HEMs are great for making dumb appliances smart. I use the other clamp from that HEM for indicating when the microwave is finished and a contact sensor connected to the light of the microwave (via a regular 110v relay) to cancel the reminders and also to remind us if we forget to close the microwave door.
