One of the simplest methods is using h2o-fed poles. This process entails using telescopic poles which has a brush and h2o technique at the end. The h2o is often purified, to ensure that it leaves the glass clean and freed from streaks soon after drying. This tutorial offers in depth https://dean8ajta.thechapblog.com/31535062/the-5-second-trick-for-cleaning-glass-facades