Laundry Detergent Sheets Test → Does the laundry really get clean?

Updated on August 1, 2026

Is doing Laundry with Laundry Detergent Sheets really that much better than traditional laundry detergent? Kassensturz ran tests and found that it is not. We are taking this as an opportunity to take a detailed, close look at our bluu Laundry Detergent Sheets, and share plenty of pros (and very few cons) with you right away.

The Laundry Detergent Sheets review from Kassensturz (Swiss television) recently tested the cleaning performance of eight eco-friendly laundry detergent alternatives, including our bluu-Laundry Detergent Sheets.

The conclusion from the Laundry Detergent Sheets test was somewhat underwhelming. According to the test, all eight products performed poorly when it came to stain removal. Why is this, and what exactly was tested?

(Click here for the test result.)

Stubborn, uncommon Stains

The test Stains were actually very stubborn: according to Kassensturz, the Laundry Detergent Sheets were supposed to remove a mix of grass, red wine, grease, and makeup Stains – no pre-treatment required.

We have always been aware that our Laundry Detergent Sheets cannot remove certain stains on their own, and we communicate this clearly to our customers.

“Getting rid of absolutely all Stains is not actually our core priority,” explains bluu co-founder Roman Stämpfli. “We focus on 99% of Stains, covering everyday dirt such as sweat. For the remaining 1% of Stains, or persistent stubborn grime, we recommend applying a targeted Stain remover – for example our bluu stain soap stick.

This means that with proper pre-treatment of Stains, laundry comes out just as clean in the bluu Laundry Detergent Sheets test as it does with conventional laundry detergent. And it is more than sufficient for everyday household laundry for people in Switzerland.

On our blog you'll find countless Tips for targeted stain treatment solutions, for example for Removing stubborn Stains or especially for Red wine- and makeup Stains.

Eco-friendly washing

We follow the approach of offering a highly eco-friendly laundry detergent, where we use only as many resources as are necessary, and as few as possible overall. We want to provide a solution that contributes to a more plastic-free world and lets you do your Laundry with a clear conscience!

Did you know that our bluu Laundry Detergent Sheets are free from:

• Perfume
• Plastic
• Microplastic
• Parabens
• Brighteners
• Bleaches
• Dyes
• Preservatives

All of these are substances used in conventional laundry detergents that help with stain treatment and prevent fabric graying — but they are mostly very harmful to the environment. We recommend only using these additives when necessary and as sparingly as possible, and otherwise prioritizing ecological Ingredients.

The expert from the Kassensturz Laundry Detergent Sheets review also confirms that Laundry Detergent Sheets use roughly ten times less cleaning agent than traditional liquid or powder laundry detergents. “This means they put less strain on wastewater treatment plants, and ultimately the environment. And because far fewer chemical ingredients are being produced, this is also better for the climate,” says ecotoxicologist Marion Junghans.

Overview of the different bluu Laundry Detergent Sheets

Even in Laundry Detergent Sheets testing, it quickly becomes clear: not every load of laundry needs the same formula. That is why our bluu Laundry Detergent Sheets come in four variants:

• Alpine Freshness (Universal): All-purpose workhorse with long-lasting freshness for everyday laundry
• Applecadabra (Universal): fresh apple scent, also suitable for all standard textiles
• nonscents (unscented): completely fragrance-free, ideal for sensitive skin
• Delicate detergent: especially for wool, silk, and cashmere with a gentle, floral-fresh note

Ideal for all wash temperatures, from 20 to 60 degrees. Suitable equally for white, colored, and dark laundry. Also usable for wool, silk, and cashmere.

All four variants can be easily compared in our shop and ordered.

Why Laundry Detergent Sheets are better

The benefit for people and the planet is very significant when using Laundry Detergent Sheets. These are just some of the additional advantages that matter a lot to us.

• Less detergent:bluu Laundry Detergent Sheets release 10x fewer active washing substances into wastewater than conventional laundry detergents, and are therefore gentler on waterways.
• Only what belongs in it: bluu is a sustainable laundry detergent that does not contain harmful Ingredients such as preservatives, bleaching agents, or optical brighteners.
• Gentle on fibers:Because our pre-dosed Laundry Detergent Sheets are never overdosed, contain fewer chemicals and no additives, they protect clothing fibers during Laundry. As a result, garments wear out less quickly over time.
• Mild and gentle:Dermatest has dermatologically tested our bluu Laundry Detergent Sheets for skin compatibility, and awarded us the "Very Good" seal for the product.
• Completely plastic-free: There is no plastic at all, neither in the product nor in the packaging. For comparison: Normal detergents are packaged in high-density polyethylene. Many of these bottles are not recycled and end up in regular waste.
• All recyclable:Not only do our Laundry Detergent Sheets come in small packaging, that packaging is also fully recyclable, which cuts down on waste. All orders are also shipped in 100% compostable mailers.
• Low CO₂ emissions:Because Laundry Detergent Sheets are so lightweight, compact, and space-saving, they are faster and easier to transport, resulting in lower greenhouse gas emissions.
• Affordable in comparison: one strip costs you only 0.27 to 0.33 CHF per wash cycle, depending on pack size.

How to wash correctly with bluu Laundry Detergent Sheets

1. Put laundry in the drum as usual, suitable for all temperatures and colors
2. Place one bluu Laundry Detergent Sheet on top: as soon as it comes into contact with water, it dissolves within a few seconds
3. Start the wash cycle and done

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bluu laundry subscription: ongoing savings

Anyone who uses the bluu Laundry Detergent Sheets in the Subscription ordered, saves 20 to 25 percent depending on pack size compared to buying the 60-pack individually, and automatically receives refills at the desired rhythm, whether monthly for large households or every three months for singles. The delivery rhythm can be adjusted at any time in your customer account, and cancellation is just as straightforward.

Easily overcome small downsides

The point criticized in the test is specifically Stain treatment. As we have already explained, this can be easily worked around. Let's be honest: what laundry detergent actually removes all Stains completely?

With the right pre-treatment, Stains are no problem at all. For on-the-go use or fresh Stains directly on the spot, our Stain pen: compact, quick to deploy and ideal for your handbag or backpack. The Stain pen treats fresh Stains like coffee, red wine or grease directly on site, so they dissolve completely without residue during the next wash cycle.

And when it comes to masking, simple home remedies often help. You can learn how to get rid of or prevent grey haze here.

bluu customers are happy

Our customer base makes it clear that the positives of our Laundry Detergent Sheets far outweigh the drawbacks. “Our large number of returning customers confirm that we are doing a lot right: they are very happy with our product,” says Roman.

Try it for yourself today, and test our Laundry Detergent Sheets with our 30-day money-back guarantee and free delivery straight to your home.

Discover bluu Laundry Detergent Sheets now

Explore more sustainable Tips & laundry solutions

Still have questions? Common questions about the Laundry Detergent Sheets test