Why whites go grey or yellow
White clothes rarely turn dull overnight. It happens slowly, through dye picked up from other clothes in the wash, detergent and body oils that are never fully rinsed out, sweat that builds up in collars and underarms, and minerals in the water. Once you know which one is the cause, the fix is usually simple.
Wash whites only with whites
Even a light grey T-shirt or a pair of blue jeans releases a little dye every wash, and white fabric picks it up. Keep a separate bag or basket for whites and wash them together, never with colours.
Use enough water, heat and rinsing, but not too much detergent
- Cotton whites can usually take warmer water than colours. Check the care label and use the warmest temperature it allows.
- Do not overload the machine or bucket. Clothes need room to move for dirt to wash out.
- More detergent does not mean cleaner clothes. Too much leaves a film that traps dirt and makes whites look grey. Use the amount on the pack, and rinse twice when hand washing.
- Pre-treat collars, cuffs and underarms with a little liquid detergent before washing.
Bleach: oxygen first, chlorine with care
Oxygen bleach (sodium percarbonate, sold as powder or in "oxy" products) is the safest way to brighten whites. Dissolve it in warm water and soak whites for a few hours or overnight before washing.
Chlorine bleach is stronger but harsher. Use it only on white cotton and linen whose label allows it, always diluted, and never on silk, wool, spandex or anything with coloured trim. It can make sweat stains and iron-based stains worse.
Never mix chlorine bleach with vinegar, ammonia or other cleaning products. The combination releases toxic gas.
Laundry blue
Laundry blue, a traditional whitener still widely used in Ghana, adds a tiny amount of blue that cancels out a yellow tint, so whites look brighter. Dissolve it fully in the final rinse water and use very little, stirring well before adding clothes, or it can leave blue streaks.
Borehole and well water
Water with a lot of iron, common in some borehole and well water, can slowly turn whites yellow or leave orange spots, and chlorine bleach makes this worse by turning the iron into rust marks. If your water leaves orange stains in buckets or sinks, wash whites in treated or filtered water where you can, and use oxygen bleach instead of chlorine.
Let the sun help
Sunlight gently bleaches white cotton, so hang whites in direct sun (the opposite of what you should do with colours). Bring them in once dry, and store whites only when they are completely clean and dry, because stains left in fabric darken over time.
Let a laundry handle it
Work shirts, school uniforms and white bedsheets can be sent to a laundry for proper washing and pressing. With the Simame - Laundry Connect app you can book a partner laundry near you for pickup and delivery. It is free on Google Play.
Common questions
Why do my white shirts turn yellow under the arms?
Sweat and some antiperspirants build up in the fabric. Pre-treat with a paste of baking soda and water, then soak in oxygen bleach and wash warm. Avoid chlorine bleach on these stains, as it can make the yellow darker.
Can I use chlorine bleach on all white clothes?
No. Only use it on white cotton or linen whose care label allows bleach, always diluted. Never use it on silk, wool, spandex or whites with coloured details.
Does drying whites in the sun really help?
Yes. Sunlight has a mild bleaching effect on white cotton and helps it look brighter. Keep coloured clothes out of direct sun, because the same effect fades them.