The outer grille on the hood is a decorative element. After a few weeks of intensive cooking, it is thoroughly greasy and completely loses all its aesthetic qualities. The process of cleaning the grate looks quite complicated, and therefore many owners start the situation and take for solving the problem only when this part begins to lose its functional qualities. In fact, it is not at all difficult to clean the mentioned hood element from fat.
What you need: rubber gloves, "Mole", a wide metal container in which our grill will fit
So, the grating will be cleaned with the "Mole" sewer pipe cleaner (sodium hydroxide solution). Directly "Mole" can be replaced by any other analogue, provided that the concentration of sodium hydroxide is between 15 and 30%. Before starting cleaning, the grate must be removed from the hood and placed in a metal container of a suitable size.
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We take the container with a grate out into the street or on the balcony, where you need to organize excellent ventilation. Pour the "Mole" (or an analogue) product on top of the grate. Fill until the part is completely immersed in the composition. The chemical reaction to dissolve the fat will start immediately and will be accompanied by foam rising. An unpleasant odor will appear.
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Important: if the grill of the hood is aluminum, then in summer it can be kept in sodium for no more than 2-3 minutes, and in winter (in the cold) no more than 10 minutes.
After that, the grate should be removed and washed under running water. All fat will be washed off together with the foam. All that remains is to dry the part and install it in place. Do not forget to use gloves so as not to grab a chemical burn to your skin!
Continuing the topic, be sure to read about good advice on how to achieve thisso that the apartment does not smell like sewage.
Source: https://novate.ru/blogs/060120/52985/