Why Exterior Windows Develop Mineral Spots: Causes and Fixes
Exterior windows develop mineral spots when water containing dissolved calcium, magnesium, silica, or other salts dries on the glass and leaves those solids behind. Sprinklers, hose water, rainwater running over masonry, and poorly rinsed window-washing water are common sources. Fresh deposits sit on the surface, while repeated exposure can create rough, hazy glass etching. Key […]
How to Tell if Solar Panels Are Dirty: 7 Reliable Checks
Solar panels are probably dirty when visible dust, pollen, bird droppings, ash, or grime coincides with lower-than-normal production under comparable sunlight. Confirm the diagnosis by combining a safe visual inspection with monitoring data and, when possible, a small surface test. A low output reading alone does not prove soiling because shade, heat, clouds, inverter limits, […]