Start with the time spent damp
The answer to how to remove musty smell from clothes dried indoors starts with a simple question: how long did the fabric stay damp? A wash can remove everyday dirt, yet clothes may still develop a stale smell if they sit wet in the drum or dry slowly on a crowded rack. In Hong Kong flats, humid weather and limited hanging space often make those delays harder to avoid.
Check where the smell is strongest. Thick waistbands, cuffs, pockets and towel edges can remain damp after lighter areas feel dry. If the whole load smells stale, look at the washing routine and drying conditions. If only heavier pieces smell, focus first on their spacing, spin setting and position on the rack.
Rewash musty clothes rather than covering the smell
For clothes that already smell musty, rewash them with detergent using a programme suited to the fabric and its care label. Choose the warmest wash the label permits rather than assuming every garment needs a hot cycle. Leave enough space in the drum for items to move, and avoid a short refresh programme for a heavily soiled load.
Do not rely on fragrance to correct a persistent stale smell. A scented finish does not establish that the washing or drying problem has been resolved. After rewashing, take the clothes out promptly and arrange them for drying straight away. Start the cycle when there will be time to empty the machine at the end.
Match the load and detergent to the wash
An overfilled drum leaves less room for garments to move through the wash and rinse. Follow the machine's programme-specific capacity, which may be lower than its headline capacity for delicates or quick cycles. In a small flat, the drying rack matters too: wash only as much as can hang without layers touching.
Measure detergent according to its instructions, the load size and the level of soiling. Adding more is not a reliable answer to odour and can make thorough rinsing harder. If garments repeatedly emerge with a slippery feel or visible residue, review the dose and loading first. Separate bulky towels from lightweight clothing when they would otherwise crowd the wash or rack.
Check the machine before the next load
A stale-smelling machine deserves attention before another load goes in. Inspect the detergent drawer, door seal and other accessible areas identified in the manual. Remove trapped lint and residue using the manufacturer's cleaning instructions. Run the recommended maintenance cycle at the stated interval, rather than waiting for a strong smell to develop.
Check whether the drum drains fully and whether clothes are coming out unusually wet. Clean an accessible filter only as directed in the manual. Persistent drainage problems need attention rather than another dose of detergent. Between washes, follow the manufacturer's guidance on airing the drum and drawer so remaining moisture can evaporate.
Remove more water before hanging
The less water left in the fabric, the less must evaporate indoors. Select the highest spin speed permitted by both the care label and the chosen programme. For sturdy items that still feel very wet, a separate spin may help if the machine instructions allow it. Keep delicate fabrics on their appropriate settings.
Shake out garments before hanging and unfold anything twisted or bunched. Straighten sleeves, open pockets where possible and loosen rolled hems. For suitable hand-washed pieces, gently press water out with a clean towel rather than wringing. These small steps expose more fabric and reduce the wet folds that otherwise dry last.
Arrange the rack for airflow, not capacity
Leave gaps between garments rather than filling every rail. Spread heavy pieces across more than one bar where space allows, and avoid stacking folded layers over a single rail. Use hangers for suitable shirts, with enough distance between them for air to move. Reshape knitwear and dry it flat when the care label requires it.
Place the rack where air can circulate around it, rather than pressed against a wall or squeezed between furniture. Keep it clear of cooking steam and bathroom moisture where possible. Reposition thick items during drying and turn them if one side stays damp. A smaller, well-spaced load is often more practical than a rack packed beyond its useful capacity.
In short
The most useful change is to shorten the time clothes spend damp: wash manageable loads, extract water well and give every garment room to dry.