The Secret to a Perfect Streak-Free Shine

Have you ever washed your car on a sunny day, only to find annoying white spots left behind after it dries? Those spots are caused by minerals and dissolved solids in your tap water. The exact same thing happens on your windows. So, how do professional window cleaners achieve a perfectly clear, spot-free finish every single time?

The secret is not just in the squeegee technique—it's in the water itself. At Perth Window Cleaning Co., we use a state-of-the-art Reverse Osmosis De-Ionisation (RO/DI) pure water system for all our exterior window cleaning jobs to deliver a superior, longer-lasting clean.

What is RO/DI Pure Water?

Perth's tap water contains a variety of minerals like calcium, magnesium, and chlorine. We measure these as "Total Dissolved Solids" (TDS). While safe to drink, these minerals are what leave behind spots and streaks on glass.

Our RO/DI system is a multi-stage filtration powerhouse that strips out 99.9% of these impurities, producing laboratory-grade pure water. In its pure state, water is a natural cleaning agent that actively attracts and breaks down dirt and grime from surfaces.

The 3 Main Benefits for Your Home

Using this pure water with our professional water-fed poles provides three huge benefits for our clients:

1. A Flawless, Spot-Free Finish

This is the most significant advantage. Because pure water has no mineral content, it dries naturally without leaving any residue behind. There are no spots, no streaks, no smudges—just perfectly clear glass. This is how we can offer our streak-free guarantee with complete confidence.

2. Your Windows Stay Cleaner for Longer

Traditional cleaning methods often use detergents that can leave behind a microscopic, sticky film. This film actually attracts more dust and dirt over time. Since our pure water system uses no soap, there is no residue left behind. Your windows will not only look cleaner, but they will also stay cleaner for weeks longer.

3. It's Eco-Friendly and Safe for Your Property

Our pure water system allows us to achieve a superior clean without the need for harsh chemicals or detergents. This makes it completely safe for your family, your pets, and your delicate garden beds surrounding the house. It's the most effective and environmentally friendly way to clean your exterior windows.