How to Clean a Metal Thermos

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Cleaning a metal thermos can be tricky, as the inside is difficult to reach with standard cleaning tools. Luckily, there are several ways to remove odors, stains and food debris from the inside of your metal thermos. Typically, soaking the container with warm water and various cleansing agents will do the job.

Things You'll Need

  • Dishwashing liquid
  • Bottle brush
  • Egg shells
  • Baking soda
  • Automatic dishwasher detergent

Warm, soapy water method

  • Rinse the metal thermos with cold water for three minutes, and then rinse with hot water for three minutes.

  • Wash with warm, soapy water and a bottle brush to remove any debris from the inside of the thermos.

  • Rinse again thoroughly before using.

Eggshell method

Baking soda method

  • Fill the container with warm water, and add 1 tbsp. baking soda.

  • Allow the metal thermos to stand for three hours. The baking soda will break up any debris inside the thermos during this time.

  • Wash thoroughly with hot, soapy water and rinse clean.

Dishwasher detergent method

  • Add hot water to the thermos until it is full, and then add 1 tsp. of automatic dishwasher detergent.

  • Allow the mixture to stand for about 30 minutes, and then wash thoroughly with hot, soapy water.

  • Rinse with cold water before using.

Tips & Warnings

  • Clean the interior of the thermos once per month to prevent dirt accumulation. Unscrew the center of the thermos and set aside. Wipe the inside of outer section with a damp cloth until no debris remains.
  • Store the thermos with the lid off to ensure it's completely dry.
  • Always rinse the thermos thoroughly after washing and again before using to ensure it is safe and clean.

References

  • Photo Credit Hemera Technologies/PhotoObjects.net/Getty Images
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