How to Get Mineral Sunscreen Stains Out of Clothes and Swimsuits
Mar 25, 2026
How to Get Mineral Sunscreen Stains Out of Clothes and Swimsuits
Last summer I pulled a rashguard out of my bag after surfing Lowers and the collar had this yellow ring baked into it. I'd already washed it. The zinc just cooked into the fabric in the dryer.
That's the thing about mineral sunscreen. It protects your skin, it's better for the ocean, and it stains everything you own. Shirts, towels, swimsuits, car seats. Nobody tells you that part when you make the switch. But the stains do come out if you know what you're dealing with.
Why mineral sunscreen stains are different
Most laundry stains are organic. Grass, food, sweat. Your detergent handles those fine. Mineral sunscreen stains are caused by zinc oxide and titanium dioxide particles suspended in oils and waxes. When those oils bond with fabric fibers and get heated by the sun or the dryer, the zinc oxidizes and turns yellow or orange.
That's why a fresh sunscreen smear on your shirt looks white but turns yellow after you wash and dry it. The heat sets the stain. This is the single most important thing to know: do not put sunscreen-stained clothes in the dryer until the stain is completely gone. Once a zinc stain goes through the dryer, the heat bonds it to the fabric permanently.
Step-by-step stain removal
1. Act fast if you can. Fresh sunscreen stains are much easier to remove than set ones. If you notice a smear on your shirt, scrape off any excess with a spoon or dull knife. Don't rub it in. Rubbing pushes the zinc particles deeper into the fibers.
2. Pre-treat with dish soap. Regular dish soap (Dawn or any grease-cutting formula) is your best first move. It's designed to break down oils, which is exactly what's holding the zinc to your fabric. Squeeze a small amount directly onto the stain, work it in gently with your fingers, and let it sit for 15 to 20 minutes.
3. Try baking soda for stubborn spots. For stains that have already set or turned yellow, make a paste with baking soda and a few drops of water. Spread it over the stain, let it sit for 30 minutes, then brush it off gently before washing.
4. Wash in the warmest water the fabric allows. Check your garment's care label. Use the warmest water temperature it can handle along with your regular detergent. Hot water helps dissolve the oily binder that holds zinc to the fibers. One note: skip the bleach. Bleach can react with zinc oxide and actually darken the stain, especially on synthetic fabrics.
5. Check before drying. Pull the garment out of the wash and inspect the stain area before it goes anywhere near the dryer. If any discoloration remains, repeat the pre-treatment and wash again. This is the step people skip, and it's the one that matters most.
What about swimsuits?
Swimsuits are trickier because most are made from nylon or spandex blends that can't handle hot water or harsh chemicals.
Rinse the swimsuit in cool water as soon as possible after wearing it. Sunscreen plus salt water plus time is the recipe for a permanent stain. Apply a small amount of dish soap directly to any visible sunscreen marks, gently work it in, and let it sit for 10 minutes.
Hand wash in cool to lukewarm water. Don't wring it out. Press the water out gently and lay it flat to dry. Never put a swimsuit in the dryer. The heat degrades spandex and will set any remaining stain.
For white swimsuits with yellowed stains, try soaking in a solution of one part white vinegar to four parts cool water for an hour before washing. The acidity helps break down the mineral deposits without damaging the fabric.
The real fix is less zinc on your stuff
The easiest way to avoid sunscreen stains on your clothes is to let your sunscreen dry completely before getting dressed. Give it a solid 10 to 15 minutes. Most staining happens when wet sunscreen transfers directly to fabric.
But the bigger issue is what happens after your session. When zinc residue stays on your skin and rubs against a clean shirt, you get transfer stains. I used to change out of my wetsuit, throw on a shirt, and find white and yellow streaks on everything by the time I got home. That's actually one of the reasons I made Kook-Off mineral sunscreen remover. It removes mineral sunscreen from your skin in one step, so the zinc doesn't end up on your clothes, towels, and car seats. I keep a tin in my truck and wipe down after every session before I put a shirt on. It made a noticeable difference. If you want the full breakdown on how to remove mineral sunscreen from your skin, we wrote a whole guide on that.
Kook-Off Sunscreen Remover & After Sun Care
2.5oz tin · $14.99 · Free shipping
★★★★★ 4.8 stars from 48+ reviews
If you've been frustrated by how stubborn mineral sunscreen is, you're not doing anything wrong. Zinc oxide is literally designed to stick. That's what makes it effective. It just means you need to treat the stains with the right approach and keep them out of the dryer until they're fully gone. And if you choose mineral sunscreen for the right reasons, a little extra laundry care is a fair trade.
