Review on HOBOT-198: Ultimate Glass and Window Cleaning Robot with Remote Control - An Unmatched Cleaning Solution by Aneta Szmit ᠌

They did it the right way: first with a dry cloth, then with a damp one. The rags were changed every time, even the product was bought with ammonia, as recommended. Some glass and the third time passed. It seemed clean, but today the sun came out, so you can see all the glass in divorces. Conclusion: if there are large windows and hard-to-reach places, then the thing is necessary. Simple windows are better to wash by hand and not spend that kind of money.