Other than a squeegee, Ms Morris says "a simple, clean microfibre cloth and some ... "Lukewarm water would generally be the best to use on a window; that way, you'll avoid any cracking or putting ...
Sure, you could take a trip to the cleaning aisle for an alternative cleaning product, but there are a few tried and tested homemade mixtures that do the job just as well (if not a little better). One ...
Kärcher made the original window vac, and it has now made, in my opinion, the best ... two suction squeegee heads (one 28cm in width, the other 17cm), a squirty bottle for the cleaning solution ...