How to sterilize glass jars

How to sterilize glass jars

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How to sterilize glass jars: instructions on the sterilization of glass jars in the conventional oven or microwave, by boiling water or other effective DIY such as sterilization in the dishwasher. Not only jars, also instructions on how to sterilize the metal caps of jars.

Sterilize the glass jarsit is an essential procedure to be able to safely store homemade jams, in oil, pickles and other DIY preserves.

Even if thesterilizationthat we operate in the home is rather mild, this however gives us the possibility to drastically reduce or even eliminate the microbial load (bacteria, yeast or fungi) so as to protect the food we seal in the jarand extend its storage safely. Today we will seehow to sterilize glass jarsin the home with simple and more or less fast methods.

Warning! Aftersterilizationdo not add excessively hot food in cold jars or on the contrary, excessively cold food in hot jars, the large temperature gap could shatter the glass jar.

How to sterilize glass jars in the oven or dishwasher

The oven can be used forsterilize glass jarswithin 20 minutes. This is my preferred method, in fact, to proceed tosterilization of jarsall you have to do is preheat the oven to a temperature of 110 ° C (no more otherwise you risk crushing theglass), arrange the jars on the tray so that they do not touch each other, close the oven door and wait 20 minutes.

Remember to use oven mitts to remove the jars as these will be hot, or, more wisely, open the oven door and wait for the jars to cool before removing them. If you have a steam dishwasher that allows you to set temperatures above 100 degrees, you can use that.

How to sterilize glass jars in the microwave

You cansterilize the glass jarseven in the microwave oven, this method is far quicker and also cost-effective.

Many blogs recommending washing the jars normally and then placing them in the microwave for 35-45 seconds, depending on the size of thejar.This system is partially valid. In this way the jars are sterilized but the problem is that the microwave chamber is full of food residues, vapors and other substances that prevent a completesterilization.

For greater safety, we recommend the use of special sterilization bags that create a sterile environment around theglass jar to be sterilized. I'm talking about containers in which to put thejars to be sterilizedbefore inserting them into themicrowave oven.

The prices of these containers are quite low, especially if you buy online: on Amazon, 10 bags for themicrowave sterilizationare offered at the price of 10.15 euros and free shipping.

Each container can be used 20 times and can accommodate from one to more glass jars to be sterilized, depending on the size of the jar. The bag should be left in themicrowavefor the 3 minutes, time required for onecomplete sterilization.

For all product information:bags to sterilize

How to sterilize the caps

As for the "caps"Of jars, I recommend buying new ones as used ones are difficult tosterilizeand above all they do not guarantee hermetic closure. Caps are inexpensive, on Amazon a pack of 100 lids can be bought for less than 10 euros, however there are also cheaper ones!

In any case, if you believe that the new caps have been contaminated in some way or that old lids are perfectly reusable, you can continue with the DIY sterilization.

To proceed tosterilization of lidsyou will have to follow these simple steps:

  1. In a pot, put enough water to cover the caps to be sterilized.
  2. Bring the water to a boil and insert the lids.
  3. Leave them in boiling water for a few minutes.
  4. Turn off the stove and immediately remove the sterilized caps from the water.
  5. Let them cool before using them.

Video: How to Clean and Repurpose Glass Jars (June 2022).


  1. Diedrick

    Is the result?

  2. Zulkikora

    I recommend to you to look in

  3. Enkoodabooaoo

    Easier on turns!

  4. Nataxe

    I regret, but nothing can be made.

  5. Waller

    I would like to know, thanks for the info.

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