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How to Clean Zojirushi Thermos?(10 Different Remedies)

How to clean Zojirushi thermos
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I know you are here because you have been facing a cleaning problem with your Zojirushi thermos. Because of this, your coffee might have a sour taste. So, here I will share with you some tips on how to clean Zojirushi thermos?

I use my Zojirushi thermos every day. It keeps my food stuff hot or cold for longer. One day, I experienced that my coffee taste was sour which I stored in the thermos. Then, I got to know, my Zojirushi thermos got stained from inside and it needs a thorough cleaning.

So, I would like to mention here different remedies to clean Zojirushi thermos and got it to stain and odor free.

How to Clean Zojirushi Thermos? (10 Different Remedies)

Following are the different methods to clean out Zojirushi thermos.


Oxiclean is an amazing cleaner which removes stains easily. Many folks use Oxiclean to cater every cleaning requirement. It is non-toxic and eco-friendly cleaner which consist of Sodium percarbonate as an active ingredient.

Apart from laundry cleaning it can be used for cleaning sports equipment, upholstery, carpets, removing grout stains, mold and mildew etc.

You can use this Oxiclean to clean your Zojirushi thermos. It is recommended to use fragrance-free Oxiclean. So that it will not get affected to the smell and aroma of next food batch stored in a thermos.

Things you’ll need:

Hot water

Oxiclean (Fragrance-free)


  1. Fill the thermos with hot water.
  2. Add Oxiclean in the thermos. Use 1T Oxiclean per Gallon water.
  3. Let soak it overnight. It helps to loosen the residue so that they will easily come off.
  4. Next morning, rinse it thoroughly.
  5. Allow it to dry.

Check out for How to Get Coffee Smell Out of Thermos?

White Distilled Vinegar

white vinegar to clean Zojirushi thermos

Some cleaning products are present in your kitchen cabinet but we never considered them for cleaning!

Yes, it is baking soda and vinegar. We have been using it for cooking dishes but never use it for cleaning.

Vinegar is a chemical-free and natural way to clean the stuff. White distilled vinegar and apple cider vinegar are both have same acidity level offers similar benefits for cleaning.

The Acetic acid in white distilled vinegar acts as a good disinfectant. It is great deodorizer too. You can clean the Zojirushi thermos by using the following process.

Things you’ll need:

Distilled white vinegar


Warm Water


  1. Pour four tablespoon of distilled vinegar into the thermos. Before pouring vinegar make sure the thermos is dry completely.
  2. Put the lid and shake the thermos for five minutes. Cover entire thermos from inside with vinegar.
  3. Remove the lid and add warm water till half thermos has been filled.
  4. Scrub the inside of the thermos thoroughly with a bottle brush. Loosen the dirt with a brush and remove the stains.
  5. Place the lid and shake the thermos again for 30 seconds. It also helps to loosen the dirt.
  6. Drain out the solution in the sink and empty the thermos. Rinse with warm water.
  7. If still there is stain or odor, repeat the process.

Baking Soda and Vinegar

Baking soda to clean Zojirushi thermos

If vinegar alone doesn’t work, try adding baking soda in it.

Baking soda is also known as Sodium Bicarbonate. Its natural chemical and physical properties make it safe for every cleaning purpose. It has a mild alkali property which helps to dissolve the dirt easily into the water. So, it is a perfect stain remover.

Whereas vinegar is also a natural cleaner. It is used to remove rust, mold, and stains and to deodorize the things.

If you don’t want to use a chemical cleaner to clean out your thermos, then the baking soda and vinegar solution is the best alternative.

Let’s get to know how to use baking soda and vinegar to clean Zojirushi thermos.

Things you’ll need:


Baking soda

Warm water


  1. Fill the thermos with warm water.
  2. Pour 1” vinegar in the thermos. The cider vinegar works best here to clean out the thermos.
  3. Add one tablespoon of baking soda.(The ratio of water to vinegar and baking soda is for 2 cups for every thermos holding capacity.)
  1. Let it sit for overnight.
  2. Scrub and rinse it thoroughly.
  3. Allow it to dry completely.

Check Out For How to Clean Coffeemaker Without Vinegar?

Denture Tablets

You might be using the denture tablets to improve oral. It has properties to remove the stain, odor, and bacteria. You can use the denture cleaning tablets to clean out the thermos.

Things you’ll need:

Denture cleaning tablets

Warm tap water



  1. Fill the 3/4th thermos with warm tap water.
  2. Add 1 dental tablet in your thermos. One tablet is powerful enough to remove the hardest stains. Any brand of the dental tablet will work well.
  3. When you add denture tablet in water, you will notice fizz. So, it is good to do in the sink.
  4. Allow the solution to soak for 5-10 minutes.
  5. Drain off the solution. Clean the inside of thermos with a bottle brush. Make sure denture tablet is removed completely.
  6. Dry the thermos thoroughly.

Dish Soap

Dish Soap to clean Zojirushi thermos

Things you’ll need:

Dish soap


Soft bristle brush


  1. Fill the thermos with sufficient clean water. Put on the lid and shake it well. Remove the lid and drain the water. In this way, you will remove loose dirt located inside the thermos.
  2. Again pour the moderate amount of water into the flask.
  3. Add a few drops of dish soap into the water. Fix the lid and shake it.
  4. If your thermos is too dirty, soak it for a few minutes.
  5. Open the cap. If you still notice hard build up inside the thermos, scrub with a soft bristle brush.
  6. Repeat the process if needed.

PBW Cleaner

PBW is a short name for ‘Powdered Brewery Wash’. This cleaning product by trusted brand Five Star has been using many home brewers. It is mainly used for cleaning home brewing equipment. It also works great to clean stain and dirt from the thermos.

PBW is biodegradable and environmentally friendly cleaner. The sodium Metasilicate and Sodium Percarbonate are the key components of this cleaner which easily removes stubborn stains.

It is an amazing product to clean stainless steel utensils. It works great to remove odor from utensils.

You can get your thermos shiny on the inside with following steps by using this PBW cleaner.

Things you’ll need:

PBW cleaner

Hot Water


  1. Fill the thermos with hot water.
  2. Add PBW cleaner 1 to 2 ounces per gallon.
  3. Soak the solution overnight.
  4. Rinse out the thermos following morning.
  5. Let the thermos dry.

Check Out for Best Coffee Grinder for Cold Brew

Urnex Cleancaf Cleaning Powder

Urnex cleancaf is nontoxic and fragrance-free cleaner which is mainly used for cleaning coffeemaker. This cleaner is simple and easy to use.

The main ingredient of this cleaner is Sodium carbonate which is not acidic. So this cleaner has no acidic properties.

It is effective to remove lime scale and residue build-up. It does a great job to clean stainless steel thermos.

Things you’ll need:

Boiling water

Urnex cleancaf cleaning powder


  1. Pour boiling water in the Zojirushi Thermos.
  2. Add Urnex cleancaf powder in the thermos.
  3. Soak the solution overnight.
  4. Rinse the thermos the next morning.
  5. Dry the thermos thoroughly and your thermos looks like brand new inside.

Mr. Clean Magic Eraser

Mr. Clean Magic Eraser is an effective product to clean the surfaces like wall, blinds, bathtub etc. It removes the hardest dirt like crayon and marker.

It is ready to use when you add water to this eraser. When you add water, the fiber inside the sponge activates to pulled away dirt and grime. It is a reusable sponge, lasts for many uses.

Let’s get to know how to use this to clean the Zojirushi thermos.

Things you’ll need:

Mr. Clean Magic Eraser

Hot water


  1. Dunk the Mr. Clean magic eraser in hot water.
  2. Scrub the inside of thermos with this eraser. Scrub it until all dirt goes away.
  3. Rinse the thermos with hot water.
  4. Let it dry thoroughly.

Kool-Aid Lemonade Powder

Do you know you can clean your Zojirushi thermos with Kool-Aid Lemonade powder?


It is much effective to clean out the stain of your thermos.

Kool-Aid Lemonade powder is used for several things like making lip gloss, making syrup for snow cones and pancakes, dying T-shirt, making plain yogurt into flavored, making cookies, cleaning dishwasher.…There is the craziest list of the multiple uses of this product!

The citric acid in the lemonade is strong. When this mixed with hot water, it easily removes the stain.

Here I will tell you how to use this to clean your thermos.

Things you’ll need:

Hot water

Kool-Aid Lemonade Powder


  1. Fill the thermos with hot water.
  2. Add Kool-Aid Lemonade powder into the thermos.
  3. Soak the solution for overnight. Let citric acid works to loosen and remove the stain, dirt inside the thermos.
  4. Rinse the thermos following morning.
  5. Dry the thermos completely.

Ecolab Dip-it

If your thermos is getting very much stained with coffee, then dip-it by Ecolab is the perfect solution. This is mainly used to clean out the coffee pot. But it is good at cleaning thermos too.

Things you’ll need:


Hot water


  1. Fill the thermos with hot water.
  2. Add a tablespoon of Dip-it.
  3. Soak it for a few hours.
  4. Rinse with hot water and make it dry.

Check Out For Best Coffee Grinder For French Press

Caution While Cleaning

  1. Do not use dishwasher to clean the Zojirushi thermos.
  2. Don’t use Chlorine type bleach for cleaning.
  3. Do not boil thermos for sanitizing.

Watch out the following video that shows how to take apart parts of Zojirushi thermos to clean.

Wrapping Up

Now you know, how to clean Zojirushi thermos. These 10 tricks you will find really helpful to clean your thermos.

I recommend trying these different remedies until you will get your desired result.

Let me know which trick works for you.