Turn the Crock-Pot off and unplug it from its power source. Allow the slow cooker and food inside to cool to room temperature.
Throw any leftover food away or transfer it to a storage container.
Fill half of the Crock-Pot with hot water. Add a few squirts of gentle dish washing soap; avoid using abrasive cleaning solutions, which may harm the Crock-Pot's interior. Use your hand or a spoon to swirl the water to create soap bubbles.
Let the Crock-Pot rest for 30 minutes to allow the hot, soapy water to break down any baked-on food.
Scrub the Crock-Pot's sides and bottom with a cloth, sponge or soft-bristled brush until the baked-on food is loosened. Pour the soapy water into a sink and rinse the Crock-Pot's interior with clean water.