Well, I thought Thursdays would be a great day for tips!
I use my slow cooker several times a week, and I forget to buy the liners (or they leak) and wind up with a BIG STICKY MESS to clean. Well, after trying almost everything I found something that works terrifically (I cannot take credit for this, but for the life of me, I can not remember where I learned this)! After your crock cools, fill it with hot water & add 1 tablespoon of either fabric softener or conditioner (yes, you read that correctly). Let it sit for a hour and clean as usual. You will be AMAZED at how easy it will be to get those messes off!