| Coated solar glass & warranties | Gentle agitation with water formulated to leave no mineral film — aligned with how manufacturers expect panels to be washed. | Risk of damaging anti-reflective coatings or conflicting with manufacturer care guidance. | Dissolved minerals can dry as spots and build up over repeat visits. |
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| Scratch risk | Soft brushes and controlled flow — no grit dragged across the glass. | Some products need aggressive scrubbing or tools that aren't panel-safe. | Particles in cloths or squeegees can still scratch if not managed carefully — we standardise kit and technique. |
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| Streak-free windows | Deionised rinse dries clean — excellent for high glass and shopfronts. | Residue and fumes; often more rinsing and runoff to manage. | Hard water marks are common without filtration. |
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| Water-wise mindset | We use what the job needs — pure water does more work per litre than flooding the roof with untreated water. | Chemical use adds disposal and environmental considerations. | Repeated heavy rinsing to fight spotting uses more volume overall. |
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