If the salt does not dissolve properly in the water (in hot water), it goes to the bottom of the bowl and leads to corrosion. We recommend adding salt when the water is hot.

It will depend on the geographic location, temperature of the water, amount of salt, etc.

It depends on the use. Normally at the end of each service.

No, in multi-cooking mode, food must be cooked in the same cooking environment. Only the time can be varied.