A: Long story short, soap scum. Surprisingly, the industry standard for window cleaning causes staining on a building's exterior. The culprit is dish soap and tap water. Dish soap consists mostly of an oily petroleum which attracts contaminants in the environment and "glues" them to all exterior building surfaces.
What Happens Next? When windows are cleaned using dish soap and tap water, this soapy mixture is scrubbed onto the glass then squeegeed off onto the metal frames and stone surfaces below along with the dirt. This dirty mixture then dries and the next time it rains, it redissolves and further washes down the building and onto your clean glass! Fortunately, there is a solution.
Learn more about Presto's revolutionary products and process to restore and maintain your building's surface to a like-new appearance. Download this brochure, contact us at 1-877-329-0472
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