This kitchen, where I am now, has a dishwasher. Before we came up, someone had bought some of those Cascade packets that are premeasured and ready to use. They were stored underneath the sink in the cabinet that houses the garbage disposal which no one uses.
Because there was mostly nuking and reheating done in this kitchen, in recent years, I bought a crockpot, which had looked rather lonely, from a nearby Walmart.
I made a discovery about that Cascade. Those packets are great for cleaning a crockpot that was, ahem, allowed to cook all day without a coating of Pam having been sprayed on the interior.
The stoneware liner with a Cascade packet inside its cruddy self was filled with really hot water. This dissolved the packet with some help from an overactive plastic spoon. I left it overnight but that was overkill. A couple of hours would do the job.
And you know the juice that somehow gets inside the metal shell of the cooker? That stuff that bakes itself on even if the crockpot is unplugged? A corner of a paper towel dipped in the solution will, kid you not, rub that burned-on juice right off. (Wear gloves!) Finally, rinse off the cleaned area with a damp paper towel.
No elbow grease required . . . just thought I'd share.