For four years every month the humidifier was cleaned according to the instructions. There was no scum. As a result, 2 piezoelectric elements of 6000 each were changed. The film on the piezoelectric element has peeled off. As a result, the F5 error was repeated again. And this is after the warranty period. I do not recommend, there are cheaper and more effective models. I took the Boneco w200 air washer, which is much more convenient to fill and maintain.
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