Skip to content
📦 Ordered before 3 pm, shipped the same day
💚 Free shipping from €19 in NL (otherwise €2.95)

Does your white laundry turn grey with laundry sheets?

Wordt je witte was grauw met wasstrips?
Laundry sheets are popular because they are convenient and more eco friendly, but many people wonder if they make white clothes go grey. This article explains what causes dull whites and how to keep laundry bright.

Laundry sheets are popular because they're eco-friendly and super easy to use. But a common question is whether laundry detergent sheets make white clothes look dull. We'll explain how clothes can lose their brightness and share tips to get your laundry sparkling white again.


Why does white clothing turn dull?

White clothes can become dull due to a buildup of dirt, sweat, and limescale in the fibers. Every wash leaves behind tiny particles that, over time, reduce brightness. Plus, some detergents and temperature settings are less effective at keeping whites bright. Especially at lower temperatures, dirt doesn’t dissolve as well, which can lead to a faded look. 


What makes laundry detergent sheets different?

Laundry detergent sheets are different from traditional detergents because they're designed as concentrated, dissolvable strips that are super easy to use. Plus, you can use them for pretty much any laundry load. Instead of liquid or powder, these sheets have ingredients that target dirt and stains, but without the harsh chemicals. That makes them a more eco-friendly choice. Just keep in mind, since they have fewer bleaches or optical brighteners, they might not always keep your whites as bright as traditional detergents do.


Do laundry detergent sheets cause dull-looking clothes?

Laundry detergent sheets are eco-friendly and have powerful cleaning abilities, but some customers mention that their white clothes can get a dull tint over time. This often happens because of the type of fabric and the water quality at home. For example, hard water contains minerals that can build up on your clothes. You can read more about it here how to test your water hardness.


Good laundry habits, like sorting your whites and using the right amount of strips, make a big difference in preventing discoloration. For the best results, adding white protect sheets can really help keep your clothes looking bright and white.


Here are a few tips to get your dull white laundry bright again:

  1. Using laundry detergent sheets with built-in whiteners: Choose laundry detergent sheets specially designed to keep your white clothes bright. These strips often contain ingredients that help maintain whiteness without harsh bleaches.
  2. Washing at the right temperature: While washing in cold water saves energy, using a slightly higher temperature can help tackle stubborn stains and dullness more effectively. Always follow the instructions on the care label.
  3. Regular maintenance of the washing machine: Make sure your washing machine is clean and free of limescale. This helps reduce residue that can make your clothes look dull.
  4. Add a natural booster: Every now and then, add a cup of baking soda or white vinegar to your laundry. This can help brighten fabrics and remove residue that makes clothes look dull.

If you notice your white clothes are getting dull, you can Cosmeau white laundry detergent sheets be a great solution. These strips are specially designed to keep your white clothes bright and fresh. For extra protection, you can also use the use white protect sheets. These help keep things bright, even with regular washing.

Back to blog

Leave a comment

Please note, comments need to be approved before they are published.

Our mission is to reduce plastic waste in our everyday products and make this possible for everyone in our society.

Logo Cosmeau Square White
  • Leaf icon Prices that are accessible for everyone
  • Leaf icon Donations to the food bank and commitment to impact for the underprivileged
  • Leaf icon Innovations and improvements in logistics, products and local production
  • Leaf icon Profit for impact. Your contribution helps planet, animals and people

We strive for

Plastic vrij
Plastic-free

As much as possible without plastic and biodegradable

Dierproef vrij
Cruelty-free

We never test on animals

Plantaardig
Plant-based

Plant-based formulas with the power of nature

Vaste vorm
Concentrated

No unnecessary transport of water

✨ Holiday and Sun Offers — May 2026
✨ Holiday and Sun Offers — May 2026

Zomerbries, 2+2 wasstrips, zomer aanbiedingen en een productie-update over de volgende generatie wasmiddel.

✨ Spring clearance discount - New: Felt storage boxes - April 2026
✨ Spring clearance discount - New: Felt storage boxes - April 2026

This post was originally sent as a Cosmeau newsletter in April 2026. Summary Mailing ✨ New:Neat felt storage boxes 🌱🌞...

🌱🌞 Spring cleaning: 1+1 Spring Fresh Wax Strips — March 2026
🌱🌞 Spring cleaning: 1+1 Spring Fresh Wax Strips — March 2026

Ready for the big cleaning? Discover our 1+1 Spring Fresh washing strips, Spring Fresh offers and useful cleaning tips.

Sorting laundry without hassle: this way you prevent discoloration and gray laundry
Sorting laundry without hassle: this way you prevent discoloration and gray laundry

Sorting laundry doesn't have to be complicated. With a simple division by color, fabric and temperature you prevent discoloration, gray wax and unnecessary wear.

Clean dishwasher without aggressive agents
Clean dishwasher without aggressive agents

Cleaning your dishwasher without aggressive agents is fine, as long as you tackle the filter, grease and hidden dirt in the right way.

Smelly Dishwasher? This Is Usually the Real Cause and How to Fix It
Smelly Dishwasher? This Is Usually the Real Cause and How to Fix It

A smelly dishwasher is usually caused by grease buildup, food residue, or a dirty filter. This article explains the real causes and the fixes that actually work.

August Update on Scent Booster Production
August Update on Scent Booster Production

Cosmeau shares a new update on scent booster production in the Netherlands. The machines shipped in June have now been unloaded and moved into place safely.

June Update on the Scent Booster Production Machine
June Update on the Scent Booster Production Machine

In June, Ben and Jason traveled to China to inspect the scent booster machines in person. This update gives you a look at the production equipment and the trip behind it.

How Is a Laundry Detergent Sheet Made? Part 1
How Is a Laundry Detergent Sheet Made? Part 1

Cosmeau shares its journey toward local production in the Netherlands and shows how the first laundry sheet tests began. Part 1 covers how the production project started in 2022.

200,000+ already help clean more sustainably

Gebruikers van Cosmeau

Reviews

Reviews on google.com 4.8/5
295
Reviews on bol.com 9.3/10
587

Questions?

Our support heroes are ready for you!

Support Support
  • Leaf icon Chat, email or call. We are ready for all your questions and suggestions.
  • Leaf icon 088 04 04 488 Call on weekdays between 10-17h.
  • Leaf icon 100% satisfaction guarantee We want to keep the barrier as low as possible for you.

Consider taking a subscription

  • Leaf icon Always the best price with automatic discounts up to 50%
  • Leaf icon No obligations you are not tied to anything
  • Leaf icon Free gifts samples, testers, and trial packs
  • Leaf icon Always enough stock of your cleaning products
  • Leaf icon Reminder before we send your next shipment, adjust, pause, or cancel

Follow us on @cosmeau.eco?