Chicago's water is moderately hard, which means every drop that dries on glass or chrome leaves the minerals behind. Most of what people call a stain is still removable. Some of it is etching, which is the surface itself being damaged, and no product fixes that.
There are two different problems that look identical from three feet away, and telling them apart saves you money and disappointment.
Deposit or etching?
Run a fingernail lightly across the mark. If you feel texture — a slight roughness or a film — it is mineral deposit sitting on top of the surface, and it comes off. If the glass feels perfectly smooth but still looks cloudy, the minerals have chemically bonded with the silica and the surface is etched. That is permanent damage, not dirt.
What removes actual deposits
- 1Acid, gently. Mineral scale is alkaline, so a mild acid dissolves it. White vinegar works on light build-up; a dedicated descaler works on heavy.
- 2Dwell time, not pressure. Let the product sit for ten minutes and it does the work. Scrubbing harder mostly just scratches.
- 3A non-scratch pad, never a green scouring pad on glass or chrome.
- 4Rinse fully and dry with a microfibre cloth. Air-drying redeposits exactly what you just removed.
Soap scum is a different animal
Soap scum is the reaction between soap and the minerals in the water: a waxy film rather than a crystalline deposit. Acid alone struggles with it. It needs a degreasing surfactant first to break the film, then the acid for the minerals underneath. That two-step order is why one product often disappoints and a proper deep clean does not.
Keeping it from coming back
- A squeegee after each shower removes the water before it can dry and deposit. It is the single highest-impact habit.
- Switch from bar soap to a liquid body wash; bar soap is the main scum contributor.
- Run the exhaust fan for fifteen minutes after showering.
- A yearly sealant on glass makes water bead and roll rather than sit.
Where this fits in a clean
Descaling is deep-clean work, not standard-clean work, because it is dwell time plus hand scrubbing rather than a wipe. If limescale is the reason you are booking, say so when you book so the right amount of time is allocated.
