Cracked Slow Cooker Insert: What Happened and What Should You Do?

Opening your Crock-Pot and discovering that the ceramic liner has cracked, flaked, or broken apart can be alarming. The damage shown in the photograph is much more serious than a minor surface scratch. Large sections of the stoneware appear to have separated, leaving sharp fragments and an uneven interior surface.

A cracked slow cooker insert in this condition should not be used again. Do not attempt to cook food in it, line it with foil, cover the damage with glue, or continue using it because the outer heating base still works.

Broken stoneware can leak food or liquid into the electrical heating unit. It may also continue breaking during heating, contaminate food with sharp fragments, or create an electrical and burn hazard.

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Unplug the appliance, allow it to cool completely, discard any food that contacted the damaged liner, and determine whether an exact manufacturer-approved replacement insert is available. If a compatible replacement cannot be confirmed, replace the entire slow cooker.

Here is what may have caused the damage, how to clean it up safely, and how to prevent another slow cooker insert from cracking.

What Is the Damaged Part?

A typical slow cooker contains two main sections:

• An exterior electrical heating base
• A removable ceramic or stoneware cooking insert

The damaged black component visible in the image is the removable stoneware liner. It holds the food while the surrounding metal base supplies gradual heat.

Stoneware is strong under normal slow-cooking conditions, but it is also brittle. It does not bend like metal. If stress develops from impact, an existing crack, uneven support, or a sudden temperature change, the material may split or break into several pieces.

The glossy black surface is a fired glaze. The thicker material below it is the ceramic body of the insert. In the photograph, the damage appears to extend through the body rather than affecting only the surface glaze.

Is a Cracked Slow Cooker Insert Safe to Use?

No. A visibly cracked or broken insert should be taken out of service.

Even a hairline crack can expand when the crock heats and cools. A large break like the one shown is an immediate reason to stop using the appliance.

Continuing to cook with it may create several hazards:

• Hot food or liquid may leak into the heating base.
• The liner may split further while being lifted.
• Small ceramic fragments could enter the food.
• Sharp edges may cut hands during handling or washing.
• Moisture could reach electrical components.
• The insert could fail while carrying hot food.
• Uneven heating may affect cooking performance.

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Do not rely on the lid or exterior base to hold a broken insert together. The ceramic liner is intended to be structurally sound on its own.