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When I had trouble cleaning my windows, I sought the help of professionals. It was then that they recommended the article https://www.fortador-usa.com/blog/best-professional-window-cleaning-tools-window-cleaner-suppliers to me. It outlines the best professional window cleaning tools offered by window cleaner suppliers. Using a Fortador Mini steam cleaner that weighs about 16 pounds, I can quickly clean any surface, including windows, with almost no chemicals, without leaving any marks on the glass. The thing is reliable as there are AISI 304 stainless steel elements. I recommend it.