How to Wash Your Swimsuit Properly Expert Tips to Keep Swimwear Looking New
Whether it is a luxury one-piece, a bikini for summer holidays, or your regular swimwear for weekly pool sessions, knowing how to wash a swimsuit properly can make a significant difference in how long it lasts.
The best way to wash swimwear is to rinse it immediately after use, gently wash it in cold water with a mild detergent, avoid wringing, and air dry it away from direct sunlight. This simple routine helps protect delicate fibres from chlorine, saltwater, sunscreen residue, and heat damage.
At Hamlet Laundry, we regularly see garments lose their shape much earlier than expected—not because of poor quality, but because of small washing mistakes that gradually damage the fabric. The good news? Most of these problems are preventable.
In this guide, we will explain how to wash swimwear properly, why swimsuits stretch or fade, common mistakes people make, and practical expert tips to help keep your swimwear looking new for longer.
Swimwear is different from everyday clothing. Most swimsuits are made from delicate synthetic blends such as:
| Material | Why It Is Used | Main Risk |
| Elastane/Spandex/Lycra | Stretch and flexibility | Heat & chlorine damage |
| Nylon | Lightweight and smooth texture | Fading |
| Polyester | Durable and chlorine-resistant | Can trap residue |
These fabrics are designed to stretch and fit closely to the body. However, they are also sensitive to chlorine, saltwater, sweat, sunscreen, friction, and heat.
Research in textile science shows that prolonged exposure to chlorine and high temperatures can weaken elastane fibres, reducing elasticity and causing stretching over time (Textile Research Journal, 2017).
That is why a swimsuit left damp in a gym bag or washed in hot water may lose shape faster than expected.
Swimsuits often wear out quickly because chlorine, saltwater, sunscreen residue, body oils, and improper washing gradually weaken stretch fibres, causing fading, sagging, or fabric breakdown.
One of the biggest mistakes people make is waiting too long.
After swimming, rinse your swimsuit in cool, clean water as soon as possible.
Why?
Pool water contains chlorine, while beach water leaves behind salt and minerals. On top of that, sunscreen, sweat, and body oils stay trapped inside fabric fibres.
According to fabric-care experts, immediate rinsing helps remove chemical residue before it settles deeply into the material (American Cleaning Institute).
Yes. Rinsing immediately helps remove chlorine, saltwater, sunscreen, sweat, and body oils that may damage swimwear fibres over time.
Even if you cannot wash it immediately, rinsing first makes a difference.
Before washing, always check the care label.
Some swimwear—especially luxury or designer pieces—contains delicate embellishments, specialty fabrics, or stitching that require extra care.
Look for instructions like:
At Hamlet Laundry, we always recommend following garment instructions first, particularly for premium swimwear and delicate fabrics.
If you want your swimsuit to last longer, hand washing is usually the safest option.
Avoid harsh detergents or bleach.
Strong cleaning chemicals may break down elastic fibres faster, especially elastane and Lycra-based swimwear (International Journal of Clothing Science and Technology, 2019).
The safest way to wash swimwear is by hand in cold water using a gentle detergent, followed by air drying away from direct heat.
Yes—but carefully.
Machine washing is not ideal for every swimsuit, but if necessary, do it properly.
✅ Use a mesh laundry bag
✅ Choose a delicate cycle
✅ Use cold water only
✅ Add mild detergent
✅ Wash with lightweight garments
Avoid heavy towels, jeans, or rough fabrics that may damage delicate material through friction.
Yes, but only on a cold delicate cycle and ideally inside a mesh laundry bag. Hand washing remains the best method for preserving elasticity and colour.
After washing, many people twist swimwear tightly to squeeze out water.
This is a mistake.
Wringing stretches delicate fibres and can weaken elasticity over time.
Instead:
This protects fabric shape without damaging stretch fibres.
Drying matters just as much as washing.
✅ Lay flat on a towel
✅ Dry in shade
✅ Choose a cool, ventilated place
Avoid:
❌ Tumble dryers
❌ Radiators
❌ Direct sunlight
❌ Hanging from straps
Heat exposure can damage elastane and speed up loss of elasticity (Textile Outlook International).
No. High heat from tumble dryers may weaken elastic fibres and reduce stretch performance over time.
Understanding the “why” behind swimsuit damage helps prevent expensive mistakes.
Chlorine disinfects swimming pools, but it is harsh on swimwear.
Over time, chlorine may:
Research has shown that repeated chlorine exposure contributes to deterioration in elastane-rich fabrics (Journal of Applied Polymer Science, 2016).
Beach water may seem harmless, but salt crystals can stay trapped in fabric.
This may cause:
A quick rinse after swimming in the sea helps prevent residue build-up.
Sunscreen protects your skin—but not necessarily your swimwear.
Residue from sunscreen, lotions, and body oils can lead to:
This becomes more noticeable with lighter-coloured swimwear.
Many swimsuits are damaged by everyday habits rather than swimming itself.
| Mistake | Why It Is Bad | Better Option |
| Leaving swimwear wet in a bag | Causes odour & mildew | Rinse immediately |
| Hot water washing | Damages elastane | Use cold water |
| Wringing fabric | Stretches fibres | Towel-roll method |
| Tumble drying | Heat damage | Air dry |
| Bleach or harsh detergent | Weakens fibres | Mild detergent |
| Drying in direct sunlight | Colour fading | Dry in shade |
At Hamlet Laundry, we frequently notice premature fabric damage caused by heat exposure and harsh washing habits—issues that are often avoidable with proper garment care.
If your swimsuit smells strongly of chlorine, do not panic.
Try this method:
For stubborn odours, some garment-care experts recommend a diluted white vinegar soak, but always check care instructions first because certain fabrics may react differently.
Wash it gently in cold water with mild detergent after rinsing thoroughly. Prompt washing helps remove trapped chlorine residue before odours settle into fibres.
Good swimwear can be expensive. Proper care protects your investment.
Avoid wearing the same swimsuit daily if you swim often.
Elastic fibres benefit from recovery time.
Poolside concrete and rough surfaces can damage fabric.
Use a towel before sitting.
Hot water and chemicals may wear fibres faster.
Never store swimwear while damp.
Dry fully before folding.
Even if it looks clean, chemical residue remains.
Home washing works well for most swimwear.
However, certain items deserve extra care.
You may want professional help for:
For example, heavily embellished or premium swimwear may require gentler handling than a standard home wash cycle can provide.
At Hamlet Laundry, delicate garments are handled with fabric-appropriate care to help reduce unnecessary wear and preserve quality wherever possible.
For London residents, this can be particularly helpful after holidays when swimwear returns stained with sunscreen, sand, chlorine, or saltwater residue.
Yes. Even if it looks clean, chlorine, salt, sweat, and body oils remain trapped in fibres.
A mild detergent without harsh chemicals or bleach is generally safest.
Yes. High temperatures may weaken elastane and reduce elasticity over time.
Residual pool chemicals trapped in fibres can create lingering odours if swimwear is not rinsed properly.
Wash gently, avoid direct sunlight, skip harsh detergents, and rinse immediately after swimming.
Taking care of swimwear does not need to be complicated.
Small habits—like rinsing immediately, washing in cold water, avoiding heat, and drying properly—can dramatically extend the life of your favourite swimsuit.
The truth is that many swimwear problems are preventable. Stretching, fading, chlorine smells, and fabric damage often happen gradually because of repeated care mistakes.
With proper washing habits, your swimwear can stay comfortable, supportive, and looking newer for much longer.
Sometimes, delicate garments deserve extra attention—especially luxury swimwear, premium fabrics, or stubborn stains after holidays.
If you are in London and want a convenient, professional solution, Hamlet Laundry Ltd. can help.
✨ Professional care for delicate garments
🚚 FREE pickup & delivery all over London
🧺 Convenient laundry and dry-cleaning services
⏰ Save time with hassle-free scheduling
👔 Expert handling of premium fabrics and special-care garments
🏠 Reliable service from a trusted London-based laundry company
Whether your swimwear needs careful cleaning after a beach holiday or you simply want expert garment care without the hassle, Hamlet Laundry makes laundry easier and more convenient.
Book your FREE pickup and delivery today and let Hamlet Laundry take care of your garments—so you can spend less time worrying about laundry and more time enjoying life.
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