How to Remove Bluish Marks from the Bottom of Your Inner Pot

Instant Pot’s inner pot (cooking pot) is stainless steel, food grade 304 (18/8) with no chemical coatings, making it healthy for you when preparing your Instant Pot® meals. It is durable and will retain its appearance for years to come with proper care.

With stainless steel cookware it is not uncommon for a bluish or “rainbow” discoloration to appear on the inside of the pot, and Instant Pot’s inner pot is no exception. Minerals or salt in the food and water are the cause for this discoloration. It may be easily removed by using a non-abrasive stainless steel cleaner, which will not only remove the marks it will help to retain the original brightness.

Another option, which is quick and easy for removing “rainbow” stains, is to cover the bottom with white vinegar. Allow the vinegar to sit for 5 minutes, remove, and rinse the pot. The discoloration marks should be removed completely.

For “White Hard Water” stains, they can be removed with a damp sponge soaked in vinegar or lemon.

Note: We recommend avoiding using steel wool to clean, as it will scratch the surface. For additional information, you may wish to verify the following sites, please see “eHow” or “British Stainless Steel Association”.

The images illustrate an Instant Pot® inner pot after an 8-month period of regular use and the results after using white vinegar to clean the stains.

Picture 1: Bluish and “rainbow” marks on the bottom

Picture 2: Bluish and “rainbow” marks on the bottom

Picture 3: after cleaning with pure white vinegar

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