Cleaning Glass Shower Doors in Ontario Homes
Glass shower doors are one of the highest-maintenance surfaces in any Ontario bathroom — and the one most affected by Ontario's hard water. Municipal water in the GTA and most of Ontario is moderately to highly hard, meaning it contains elevated calcium and magnesium mineral concentrations that deposit on glass with every use. Here's how to maintain them and what professional deep cleaning does differently.
The Problem: Hard Water Scale
Hard water deposits calcium carbonate on glass in the form of white, hazy mineral scale. Unlike soap scum (which is softer and cleans with a basic surfactant), mineral scale requires an acidic solution to dissolve. This is why regular bathroom spray and a cloth often doesn't work on Ontario shower glass — the spray is pH neutral or slightly alkaline, and doesn't chemically react with calcium scale.
What Works
- Citric acid spray: A diluted citric acid solution (1–2 tsp citric acid powder in 250ml water) applied to glass, left to dwell 5–10 minutes, then scrubbed with a non-scratch pad and rinsed. Works well for moderate buildup
- Commercial hard water removers: CLR (Calcium Lime Rust) or equivalent — effective but need to be kept off metal frames and grout (they're acidic enough to damage some metals and grout if left too long)
- Professional squeegee after every shower: The most effective maintenance approach — 30 seconds of squeegeeing after each shower dramatically slows scale accumulation
What Doesn't Work
- Vinegar on calcium scale — vinegar (4–8% acetic acid) is often recommended but is too dilute for significant hard water deposits in Ontario homes. It works for light buildup, not the cloudy heavy scale common in GTA homes
- Bleach — ineffective on mineral scale entirely. Bleach is for biological stains, not mineral deposits