In general, if it weren’t for the price, I would put 4 points and maybe even 5. But guys, such a “toy” for more than 20 thousand, this, in my frank water, is a divorce (not on window glass, but in life). Then write everywhere on the boxes (let all manufacturers of these robots be obliged to do this): not for washing, but for maintaining cleanliness, there is also a table of permissible temperatures, minimum window areas, etc. and so on.
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