How do I prevent ketchup stains on my swim trunks?

Regularly rinsing and hanging swimwear up to dry can help reduce the chance of a ketchup stain attaching itself.

Can I put my swim trunks in the washing machine?

Most swimwear is not designed to be machine washed. If the care instructions recommend machine washing, use a gentle cycle and cold water to avoid damaging the garment.

WikiLaundry > Stains > Ketchup > Swim trunks

Clean Ketchup Before It's Too Late: How To Easily Remove Ketchup Stains From Swim Trunks

Nothing ruins a fun day in the sun like an accidental ketchup stain on your favorite swim trunks! Though it may seem like a permanent disaster, there are ways to easily and effectively remove ketchup stains from swimwear. Learn how to clean even stubborn ketchup stains and extend the life of your swim trunks.

Updated 01 Jul 2023

By Luke Smith

What You Need to Get Started

Dish soap
White vinegar
Old toothbrush or small brush
Baking soda
Hydrogen peroxide
Clean white towel

Step-by-Step Guide to Removing Ketchup Stains

As soon as you notice the ketchup stain, rinse swim trunks in cold water. This helps to reduce amount of ketchup that will eventually be absorbed by the material.
Gently rub a small amount of dish soap into the affected area. The more vigorously you rub, the more likely the ketchup is to spread further.
Create a cleaning solution of 1 teaspoon white vinegar with 2 cups of cold water. Dip a white towel into solution and begin blotting the stain.
Mix together 1 teaspoon baking soda with 1 teaspoon hydrogen peroxide. Using a soft bristled brush, gently rub the mixture into the stained area.
Rinse the swim trunks in cold water.
Repeat the process until the stain is gone.
Air dry the swim trunks in a shady spot indoors.

Additional Tips for Keeping Swim Trunks Ketchup-Free

Do not use any hot water or put swim trunks in wash with other clothing.
If the garment is not colorfast, test the cleaning process on a small, hidden area first.
Do not rub the stain — gently dab it instead.
Always read the care instructions located on the tag before attempting to clean the garment.

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