Why Do Slow Cookers Crack?

In this brief guide, we will answer the query, “Why Do Slow Cookers Crack?” and will discuss possible ways to fix the crack in slow cookers.

Why Do Slow Cookers Crack?

Slow cooker cracks because if the slow cooker’s crock (ceramic insert or glass) is faulty or mistreated, it will fracture. Extreme temperature fluctuations, putting it on a stovetop burner, or slamming it down too hard on a flat, solid surface are all common causes of breaking.

5 Causes of Slow Cooker Cracking

While your slow cooker’s glazed-ceramic stoneware component (crock) is thick and heavy to hold, it is also very fragile. This implies it’s prone to breaking in a variety of situations, both hot and cold. Let’s look at some of the more detailed reasons why your slow cooker may break in specific situations.

If the slow cooker cracks during cooking.

There are three major reasons why your slow cooker may break during cooking.

·         Cooking Frozen Foods Straight from the Fridge

 If you don’t defrost frozen items before putting them in your slow cooker, the temperature of the crock will rapidly change. This may lead to little hairline fractures that aren’t detected. If subjected to continuous stress, they will grow into much bigger fractures.

·         Refrigerate your crock before using it to cook.

 Preparing your slow cooker the night before saves time, but putting it in the fridge overnight to break it in if you intend to use it right away is also a good method to break it in. Stress fractures will form in the ceramic as a consequence of the extreme temperature fluctuation, resulting in large cracks over time.

·         Putting Your Crock on The Burner Directly

While your crock’s ceramic composition is microwave and oven safe, it cannot be put directly on your cooktop burners. There will be too much heat along the bottom of the crock and not enough heat at the top if you put it directly on the burner. The bottom half of your crock will grow rapidly, while the top part of your crock will not. The whole bottom of the crock cracks or snaps in two as a consequence of this.

If your slow cooker cracks during or after the cooking process

While it’s uncommon for your crock to break during the cooking process, it’s much more probable to crack or shatter before or thereafter due to unforeseen events.

·         Putting a Cold Crock in a Hot Crock

 While it may seem natural to soak your crock in cold water after cooking with it, this is not a good idea. In their warmed condition, materials like ceramic expand, while immersing it in cold water causes it to cool quickly.

This implies that if you put your heated ceramic crock in cold water, certain portions may shrink while others will expand, resulting in fractures that may fall apart. For the same reasons, the opposite of this is also true: pouring cold water into a heated crock. The only difference is that any fractures will appear on the interior of the container first.

·         On solid surfaces, pressing the crock down too hard.

 Although our ceramic crock inserts seem to be quite tough and robust, the material is very delicate and brittle. This implies that although scratching the surface is tough, cracking or chipping it is considerably easy. You will create tiny cracks in the material if you put your crock down too firmly on a hard, smooth surface.

What Can You Do If Your Slow Cooker Is Cracked?

Although there are food-safe alternatives available, such as ceramic cement and glues for repairing equipment such as coffee cups and plates, they are not designed for the high temperatures that slow cookers run at.

Most ceramic cement and glues will break down in a slow cooker, producing the same cracks to appear. The few ceramic types of cement on the market that promise to fix this problem are more costly than completely replacing the crock or slow cooker.

Using simmering milk to heal the surface of the crack is a temporary treatment that is often suggested for hairline cracks. This method may seal the crack and make it watertight, but it isn’t foolproof and takes a lot of milk. Purchasing a new crock is usually just as efficient.

Is Eating from a Cracked Crock-Pot Safe?

There are several issues with utilizing a cracked slow cooker that makes it dangerous to use.


 Food will be trapped in cracks between usage, spreading germs into future meals. Cracks are notoriously difficult to clean correctly, thus food will get stuck in them between uses.

Compounding damage

 A crack may quickly develop, much as in your car’s windshield, and ultimately produce a break, shattering your crock.


 The ceramic and/or glaze of certain older slow cooker brands (before 2005) contain trace levels of lead. If any of them is damaged, there is a danger of lead leaking into the meals prepared within. Anyone who consumes the meals over a long period may suffer long-term consequences.

Other FAQs about Slow Cooker that you may be interested in.

Why Does Slow Cooker Food Taste Bland?

Can you fry in a slow cooker?

Can you use a roaster as a slow cooker?

Why Do Slow Cookers Crack?


In this brief guide, we answered the query, “Why Do Slow Cookers Crack?” and discussed possible ways to fix the crack in slow cookers.