Chlorine smell is stubborn in a way most laundry smells are not. It survives a wash, it comes back when the fabric warms up, and it clings hardest to exactly the things that went in the pool: swimsuits, towels, and whatever was in the bag with them.
The reason it lingers is that it is not really one smell, and the usual approach only deals with part of it.
What you are actually smelling
The sharp pool smell people associate with chlorine is mostly not chlorine. It is chloramines, which form when chlorine reacts with the nitrogen compounds people bring into the water, meaning sweat, skin oil, and everything else. A heavily used pool smells stronger than a clean one, which is the opposite of what most people assume.
Those chloramines bind to fabric. They are not simply sitting on the surface where a rinse would carry them away, and they release slowly, which is why a swimsuit that seemed fine in the evening smells again the next morning in a closed bag.
There is a second layer underneath. Pool water also leaves mineral deposits and sunscreen residue in fabric, and both of those hold the chloramines in place. Deal with only the chlorine and the smell comes back, because you have left the thing that was holding it.
Start before the wash
Rinse immediately, in cold water, before anything else. This is the single highest-value step and it is the one people skip. A rinse within a few minutes of leaving the water removes most of the chlorine before it has time to bind. A rinse four hours later removes a fraction of that.
Cold, not warm. Warm water opens the fiber and drives the compounds further in.
Rinse until the water runs clear and you can no longer smell it in the stream. That usually takes longer than people expect.
Never seal it in a bag. A wet swimsuit in a closed bag for the drive home is the single worst thing you can do to it. Damp, warm, and sealed is where the smell concentrates and where mildew starts on top of it. Use a mesh bag or leave the bag open.
The soak that actually works
For anything that already smells, a soak does more than a wash cycle will.
Half a cup of baking soda in a basin of cool water, and let the item sit for an hour or two. Baking soda neutralises the acidic compounds directly rather than diluting them, and it is safe on swimwear.
For a stronger version on towels and cotton, use oxygen bleach rather than chlorine bleach, following the packet, in warm water for several hours. Oxygen bleach breaks down the organic residue holding the smell.
Then wash normally with a small amount of detergent, and add an extra rinse.
One thing you must not do
Do not mix vinegar with chlorine bleach. Vinegar gets recommended constantly for laundry smells, and it is genuinely useful for many of them. Combined with chlorine bleach it releases chlorine gas, which is dangerous in an enclosed laundry room.
If the smell in your laundry came from a swimming pool, the chlorine is dilute and a vinegar rinse is fine. If you have been using chlorine bleach in your machine, do not follow it with vinegar, and do not pour both into the same cycle or the same basin. Run a plain water cycle in between.
The same goes for anything containing ammonia, including many glass cleaners. Chlorine bleach goes in on its own or not at all.
Sunlight, which is free and works
Ultraviolet light breaks down chloramines. Hanging a swimsuit or towel outside for a few hours does more for the smell than a second wash cycle, and it costs nothing.
The trade is that ultraviolet also degrades elastane and fades dye, and swimwear is mostly elastane. So dry swimwear in shade with air moving rather than in direct sun. White cotton towels can go in full sun.
Why the towels are the harder problem
Swimsuits are small, get rinsed, and dry fast. Pool towels are thick, absorb a great deal of pool water, and usually go into a bag or a hamper still damp.
Towels also carry more of the mineral and sunscreen residue, and that residue is what makes them feel stiff and stop absorbing. A towel that has been through a summer of pool use and never been stripped will hold the smell no matter how often it is washed, because the residue is still in it.
Stripping them fixes it. Wash on hot with no detergent at all and half a cup of washing soda plus oxygen bleach. Run a second rinse. The water will look worse than you expect, and that is the point. Do this once at the end of pool season rather than every week.
What makes it worse
Fabric softener, which coats the fibers and seals the residue in. On pool towels it also destroys the absorbency you are trying to restore.
More detergent, which leaves residue that holds odour rather than removing it.
The dryer, before the smell is gone. Heat sets it. Smell the item wet, and if it still carries the smell, wash it again rather than drying it.
And leaving it. Every hour between the pool and the rinse makes the job harder.
The Haltom City part
Two local things matter here.
North Texas summers run long and hot, which means pool season here is not a short window. It runs from May well into September, and a household with swimmers is dealing with this every week for five months rather than a few times a summer. That changes it from an occasional problem into a routine one, and it is worth setting up the rinse habit properly rather than treating each load as a one-off.
The heat also compresses your margin. A wet swimsuit or towel left in a car or a bag in a Texas August does not have overnight before it turns. It has a couple of hours. The bag rule matters more here than almost anywhere.
The second factor is that the water in this area is hard. Minerals bind with detergent and reduce how much of it works, and mineral deposits in fabric are one of the two things holding the chlorine smell in place. Half a cup of washing soda in the wash handles the minerals and lets a normal detergent dose do its job, which is a better answer than adding more detergent.
When it needs more machine than you have
A summer of pool towels is a large, heavy, thick load, and stripping them properly needs hot water, real water volume, and a long enough cycle to rinse everything you have just lifted back out of the fabric. That is where a small home machine on a short cycle falls short, and it is why the smell survives.
The machines at our self-service laundry on Denton Highway reach higher wash temperatures and move far more water per cycle, which is what it takes to strip a season of residue out of towels rather than move it around.
Our machines and the store are cleaned daily, which matters for a load that has been sitting damp in a bag.
Our wash-dry-fold service covers the everyday laundry while you deal with the pool load properly.
The short version
The pool smell is mostly chloramines, not chlorine, and they bind to fabric rather than sitting on it. Rinse in cold water immediately, because a rinse within minutes removes most of it and a rinse hours later does not. Never seal wet swimwear in a closed bag. Soak anything that already smells in baking soda, or oxygen bleach for towels, then wash with an extra rinse. Never mix vinegar or ammonia with chlorine bleach. Use sunlight on cotton and shade on swimwear, since ultraviolet destroys elastane. Skip fabric softener entirely. And never put anything in the dryer while you can still smell it, because heat sets it permanently.
WaveMAX Haltom City is at 3534 Denton Hwy, easy to reach from Haltom City, north Fort Worth, and the surrounding area. If a season of pool towels needs more machine than you have at home, call us at 817-349-9394.