For exterior windows, we use a water-fed pole. This means our window cleaning is safely working at ground level. We use purified water as it gives a streak free finish. Purified water is free from any minerals or chemicals that could leave residue or streaks on your windows. Purified water has a unique ability to absorb dirt more effectively. When cleaning windows, the absence of minerals allows the water to bond with dirt particles, making the cleaning process more efficient. As a bonus, this effectiveness eliminates the need for harsh detergents or chemicals, making it an environmentally friendly option.