Cloudy shower glass: removing limescale and soap film

What the cloudiness is

If you have a cloudy shower screen, what you are seeing is usually build-up on the surface of the glass. Each time the screen dries, the water left on it leaves behind what it was carrying. Over many showers, minerals and soap can leave a film that looks dull, spotty or milky.

PUB's drinking water quality table gives total hardness (as CaCO3) ranging from 7.24 to 191 mg/L, and calcium ranging from 2.81 to 74.6 mg/L. As water dries on glass, minerals like these can stay behind as spots.

Soap adds a second layer. Traces of soap that are not rinsed away dry into a thin film, so a cloudy screen is often a mix of both. The same simple habits deal with each one: wash the glass gently, rinse it well and dry it so water does not sit on it.

A gentle routine clean

HDB's home care guide for toilet fittings says to clean the shower screen regularly, and to clean chrome fittings with mild detergent. A short routine done often is easier on the glass than a hard scrub done once in a while.

1. Wet the glass. Rinse the whole screen with the shower so loose dirt and soap start to lift.
2. Wash with mild detergent. Put a little mild detergent on a soft cloth or sponge and wipe the glass in overlapping strokes.
3. Rinse thoroughly. Rinse from the upper edge downwards until no suds remain, since detergent left to dry can leave a film of its own.
4. Squeegee or wipe dry. Draw a squeegee down the glass or wipe it with a dry soft cloth, so no water is left to dry into spots.

While you are there, wipe the chrome hinges and handles with the same cloth and dry them too. A clean shower screen also makes it easier to notice stains on the joints around it. If the lines between the floor or wall tiles look dark, see how to clean tile grout.

Stubborn spots and soap film

If cloudy patches remain after a routine clean, repeat the gentle clean rather than scrubbing harder. Build-up that has formed over a long time may need a few rounds to lift. Stick to a soft cloth or sponge each time, and avoid scouring pads, which can scratch the glass. A scratch cannot be wiped away, so it is worth being patient.

Soap scum on shower glass is handled the same way: wet the glass, wash it with mild detergent, rinse well and dry it. Working on one small area at a time helps you see what is coming off.

If you choose to use a descaler or an acid cleaner, follow the product label, try it on a small area first and rinse the glass well afterwards. Keep it to the surfaces the label says it suits, and keep the bathroom ventilated while you work.

Look after the sealant

The sealant is the flexible strip along the joints where the screen meets the wall and floor. Water runs down the glass and settles along these lines, so they need the same attention as the glass.

HDB's home care guide says to clean the glass and sealant to prevent fungi growth, and to replace the sealant when needed. During each routine clean, run the soft cloth and mild detergent along every sealant line, rinse it, then dry it. Avoid picking at the sealant or scraping it with anything sharp, as that can open gaps.

If dark marks stay after cleaning, or the sealant has cracked or pulled away from the glass or tiles, it may be time to replace it. The guide on silicone sealant replacement explains what the job involves.

Handle the glass with care

HDB's home care guide says not to use excessive force on tempered glass, and to engage a contractor to dismantle, alter or modify the shower screen. Keep both points in mind whenever you clean.

Use light, even pressure when you wipe. Do not lean on the panels, hang heavy items from the doors or frame, or pull hard on a door that feels stiff. If a sliding panel drags or will not move, do not force it; see what to check when a sliding shower door is stuck.

Keep it clear between cleans

The simplest way to keep cloudiness from coming back is to stop water drying on the glass. After each shower, run a squeegee down the screen or wipe it with a soft cloth. Keep the bathroom ventilated as well, by opening a window or using an exhaust fan if you have one, so the glass and sealant dry sooner.

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