Stubborn drip rings often form inside slow cookers after use, making cleanup a real chore. My own was heavily crusted after a recent meal and nearly impossible to scrub clean.
Thankfully, I've discovered a proven, genius trick that lets your slow cooker clean itself—no vigorous scrubbing required. The secret? A simple soak in baking soda and white vinegar. Here's how:

1. Fill your slow cooker with enough water to fully cover the dirt ring.

2. Add about 250 ml of white vinegar (for a 6-liter cooker).

3. Gradually add 150 g of baking soda, allowing bubbles to rise before adding more.

4. Set to the lowest heat, cover, and let it run for 4 hours or overnight.
5. Turn off and check: you'll see loosened residue floating freely.

6. Remove the lid and let it cool for about 1 hour to prevent burns.
7. Dump the mixture down the sink, add a bit of dish soap, run hot water, and wipe with a sponge.
8. Let it air dry completely.

Spotless! Your slow cooker looks brand new with all traces gone. This method is quick, easy, and highly effective.
As a daily slow cooker user, this trick has been a game-changer for me, effortlessly banishing stuck-on residue and odors.

Baking soda naturally deodorizes without harsh chemicals. Combined with vinegar, it creates a fizzing reaction that loosens baked-on grime from the sides.
The gentle heat from the low setting lifts away every bit—no rubbing needed. For a 3-liter cooker, halve the vinegar and baking soda amounts.