Product defects TFA 30.1035 Vision Solar Window Thermometer

I order this window thermometer already for the 3rd time, but not because they are so good, but because during heavy rain at the window they give up their minds and later partially or fail completely. Also at the 3rd Assembly I have the thermometer deducted at the 1st storm immediately and dried. Has probably the 3rd complaint spared. In my earlier orders without solar part there was never called Reklamationen.Das the product is not properly sealed or not yet mature !!!!