For external windows, frames, sills and doors we use purified de-ionised water delivered through a low pressure water fed pole. This system, used by all modern window cleaners ensures most windows can be reached from the safety of the grounds. The de-ionisation process turns the water into an attractant. It actively pulls dirt towards it, which then beads up and rolls off the window. The window cleaner simply has to agitate the surface with the soft bristled brush and rinse afterwards. The purification prices ensures no minerals are left in the water so the windows are left to dry naturally without leaving any residue. Internally, we use the traditional squeegee and scrim method to ensure all glass is left sparkling clean. We're always careful to ensure no drops of water or dirt are left on surfaces.