Causes : White spots are caused by coagulation of minerals such as calcium or sodium contained in tap water or ingredients.

It's a very natural phenomenon that occurs in stainless steel cookers.

It can be seen when there is water, but sometimes when the water dries up.

Workaround : Add baking soda + vinegar or citric acid + water and bring to a boil.
Afterwards, don't throw it away immediately, cool it down, then wipe the pot well.