If you have handled fish products without wearing gloves, you can keep in the kitchen a potassium alum stone, a remedy particularly effective and convenient to use if necessary, or use other methods (for more information, you can read the post on how to remove the smell of fish from the hands in the most effective ways).
The secret to eliminating the unpleasant smell of fish from flatware and various kitchen utensils is a simple homemade tip that is part of grandmother's remedies; you must rinse them as soon as possible under a jet of cold water after removing any remaining food .
Then soak them always in cold water (hot water fixes the smell) with dishwashing liquid and lemon juice or white vinegar (about 1 cup for a full sink) and let it soaked for 5-10 minutes and then wash normally.
Some people use bleach diluted in water for this purpose, but this is an harmful chemical and it is advisable not to use it on things that come into direct contact with food.
And in general it can easily provoke the formation of blotches, especially on clothes.
If you prefer to use the dishwasher, you must rinse in cold water dishes, cutlery and various pots and then place them in the dishwasher, after putting a glass of white vinegar in the rinse aid tray and in the detergent one the usual dose of detergent and 1 tablespoon of simple sodium bicarbonate, which helps cleansing action and neutralizes odors at the same time.
It is also useful to place 1/2 lemon in the rinse aid tray.
In any case, it is recommended washing the dishes and pots that have been used to cook the fish separately from the other dirty dishes, as they could contaminate them with their unpleasant aroma.
Separate washing is essential, but it is obvious that you must also have the foresight to reserve (and keep separate from the others) a sponge only to wash dishes, pans, pots, cutlery and various kitchen utensils that have come into contact with fish somehow.
To eliminate the smell of fish from pots, pans and various dishes, you can also use some tea leaves wet with water; you can rub the entire surface of the utensils, then wash normally and rinse with cold water.