Tip & How-To about Retail Supplies

Sterilize your jam jars!

Do you want to make delicious jams, chutneys and other preserved foods? Here is how to sterilize your jars and keep your food safe from bacterial contamination.

First thing is washing very well the jars and their covers under running water.
It is best to sterilize the jars right when you intend to fill them so that they don't have time to get contaminated.

Take a large pot with high sides and cover its bottom with a cloth. Then set the jars on the cloth, their opening facing up.
With other cloths separate each jar from the other to avoid their breaking while boiling. Here is a picture from GialloZafferano:

At this point pour water in the pot until it covers all the jars and then turn on the fire, bringing water to boiling. You can then turn down the fire and leave the jars in the water 30 more minutes.
10 minutes before the end put in the water also the caps of the jars that need to be sterilized. Like in this picture:

After the 30 minutes are over you can turn off the fire and let it cool off.
When water reaches room temperature you can take out the jars and let them drain well, on a dry cloth. Another way of drying them is putting them in the oven at minimum temperature. This would dry them faster and kill whatever bacteria is left.
When the jars are completely dry they are ready to be used for jams and all kinds of preserved goods.

Posted by on

Retail Supplies Logo

Related Topics:

Related Questions:

1 Answer

How to avoid condensation on the inside cover of homemade jams?

That is natural water vapour. You may find cooking for longer will remove the water and stop it happening. Don't forget, air with water allows bacteria to grow. Only if there is both of course!

Oct 27, 2014 | Sur La Table Le Parfait Homemade Jam Jar,...

1 Answer

My watermeleon preserve started getting mouldy on the top not sumerge in the syrup.How do i safe it?

First of all, your question is posted under Motorcycle Protective Gear. Secondly, if your preserves have mold on them, throw them away to avoid serious food poisoning. Next time you try making watermelon preserves, make sure your jars are sterile before filling, add a little lemon juice and possibly some pectin to the preserves, and fully immerse the jars in the hot water bath.

Oct 14, 2013 | Merrell Mens 2012 Ice Jam 6 Waterproof...

1 Answer

If I were to make jam, woulds a plastic container be ok to keep it in?

you could use a plastic container however a glass jar with a screw top lid would be much better as they are easier to clean and keep the preserve better.

Jan 10, 2013 | Retail Supplies

1 Answer

What is the best temperature to keep the refrigerator ( Hotpoint)

What should a Hotpoint fridge temperature be?

Your Hotpoint fridge is designed to operate at a temperature ranging from 0.5 degrees in the coldest part up to 5 degrees inthe warmest part.

As warm air rises and cold air falls it is safe to say that the best way to store your food is to place it in the most appropriate shelf compartment, as shown in the diagram below.


  • Zone A - Cool Dairy Products, Cheese, Butter, Margarine, Low Fat Spreads, Cooking Fats/Lards, Preserves, Jams, Curs, Marmalade, Salad Dressing or Sauces
  • Zone B - Colder General Food Storage
  • Zone C - Coldest Meat, fish & poultry, Pre-cooked/chilled food
  • Zone D - Salad Bin, Vegetables, Fruit and Salad Items

May 08, 2011 | Hotpoint Refrigerators

Not finding what you are looking for?

933 people viewed this tip

Ask a Question

Usually answered in minutes!

Top Retail Supplies Experts


Level 3 Expert

1748 Answers


Level 3 Expert

78919 Answers

Patrick Tinashe...

Level 2 Expert

592 Answers

Are you a Retail Supply Expert? Answer questions, earn points and help others

Answer questions