When I ordered the Leifheit built-in washer and squeegee from the Professional series, I have to also order the Leifheit glass cleaner and am really excited!
The product is very economical in use (25 ml to 5 liters of water), smells good, does not attack even sensitive hands and the windows are really spotless, even if, for example, after the winter or pollen in the spring a little more dirt on the wheels is.
To me that means is the perfect complement to the other window cleaning tools from Leifheit!