SterilizationMedium
Wet jars before sealing
Is it safe to use wet jars and what it means.
Quick answer
If there are no spoilage signs, it is usually safe.
Problems
Why jars crack during sterilization
Jars crack due to temperature shock, glass defects, or improper handling.
SterilizationAttention level: Medium
Quick summary
Usually caused by thermal shock.
What happened
Problem symptom
A glass jar cracks during heating or filling.
Risk
Medium.
Category
Sterilization.
What to check
Jar temperature, glass condition, and heating method.
Why it happens
Main causes
- Thermal shockA sudden temperature difference between a cold jar and hot liquid causes stress in the glass.
- Glass defectsSmall cracks or chips weaken the jar and increase the risk of breakage.
- Improper placementDirect contact with the pot bottom or other jars during heating can cause cracking.
What to do
Next steps
- 1
Do not use damaged jars
Even small defects can lead to breakage.
Important - 2
Heat gradually
Avoid sudden temperature changes.
- 3
Use a base layer
A towel or rack reduces direct contact with the bottom.
How to reduce the risk
How to avoid this problem next time
FAQ
Why do jars crack?
Due to thermal shock or glass defects.
How to prevent it?
Heat gradually and inspect jars.
Related recipes
Recipes where cleanliness and ratios matter most
Helpful explanations
Guides that help you cook with more confidence
Tools
Calculators and services nearby
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Open solution
SterilizationHigh
Jars cracking during sterilization
Why jars crack during sterilization, what causes it, and how to prevent it.
Quick answer
Do not use the product if the jar has cracked due to risk of glass contamination.
SterilizationHigh
Why jars explode
Why jars explode and when it is unsafe to consume the contents.
Quick answer
Jar explosion indicates danger—do not consume the product.