About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out material, long-term or laboratory tests. Our aim is to provide honest feedback to help you make a purchasing decision. For a detailed insight into our comprehensive evaluation process, which forms the basis of all our product reviews, please click here.

Thermostar
Wash ball

In our comprehensive test, the Thermostar wash ball achieved impressive results. The benefits, such as the savings in detergent costs, the gentle treatment of the washing machine and the softness of the laundry, are undoubtedly remarkable. The wash ball is an ideal choice for people with sensitive skin in particular, as it leaves no allergenic residue. The colors of the clothes remain intense and fresh even after several washes. One small drawback, however, is that the wash ball does not leave a fragrance on the clothes, which some consumers might find desirable. It can also be less effective on stubborn stains, which is why pre-treatment may be necessary. Overall, the Thermostar wash ball has the potential to make laundry washing more sustainable, gentle and cost-efficient. Thanks to its environmentally friendly properties and its benefits for the laundry and the washing machine, we can recommend the wash ball to end users who are looking for an effective alternative to conventional detergents and who value skin compatibility and environmental protection.

Advantages

✅ Saves detergent
✅Softer laundry
✅Suitable for sensitive skin

Disadvantages

❌ Pre-treatment is required for stubborn stains

The first impression

Packaging and contents

ℹ️ Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

CriterionRemarkScore achieved*
Product protectionCarton is sturdy, product sufficiently protected100 points
Sustainability PackagingLess packaging waste, replace plastic film70 points
Package contents & scopecompletely included100 points
Instructions for useAvailable, but only in English80 points
Total88 points
Weighting: 20%
*The maximum score is 100 points

The first impression of the Thermostar wash ball is characterized by well-designed packaging that protects the product from external influences. The sustainability aspect of the packaging is particularly positive: unnecessary packaging waste has been avoided as far as possible and an alternative to the use of plastic film would be desirable. Opening the packaging reveals that the contents of the package are complete and of an appealing size. One small drawback, however, is that the enclosed instructions for use are only available in English. This could be a language barrier for some consumers. Nevertheless, the overall positive impression remains, as the product is delivered complete and well protected and the use of environmentally friendly packaging materials is taken into account. In future versions, it would be desirable to offer the instructions for use in several languages in order to reach a broader target group and increase convenience for users.

The first time in your hand

Product processing and appearance

ℹ️ Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

CriterionRemarkScore achieved*
Visual appearanceappealing100 points
ProcessingNo quirks, no edges100 points
Sustainability of the productSustainable, as it saves detergent and water100 points
Total100 points
Weighting: 20%
*The maximum score is 100 points

The Thermostar wash ball impresses with its appealing visual appearance as soon as you touch it. The clear and modern design conveys a certain quality, which is also reflected in the workmanship. On closer inspection, it is noticeable that the workmanship of the wash ball is extremely high quality. It has no annoying corners or edges and is comfortable to hold. This is evidence of careful manufacture and a well thought-out design that makes it comfortable to use. Another important aspect that should not be overlooked in the assessment is the sustainability of the product. The Thermostar wash ball uses innovative technology that makes conventional detergent superfluous and therefore reduces the consumption of detergent and water. This not only saves costs, but also protects the environment. Overall, the Thermostar wash ball is an all-round successful product with an attractive appearance and first-class workmanship. Its sustainable properties not only improve the quality of the laundry, but also help to protect the environment. The Prüfengel Institute is convinced of the positive features of the wash ball and is happy to recommend it to others.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

ℹ️ Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

CriterionRemarkScore achieved*
Cleanliness & stain removalThorough cleaning, pre-treatment required for stubborn stains80 points
Skin compatibilityNo allergic reactions, suitable for sensitive skin100 points
Preservation of colors & elasticityColors remain intense, fabrics remain elastic100 points
Detergent savingsNo need for conventional detergent100 points
Total95 points
Weighting: 45%
*The maximum score is 100 points

Our practical test of the Thermostar wash ball showed that the manufacturer largely lives up to its advertising promises. In terms of cleanliness and stain removal, the wash ball was convincing in that it was able to thoroughly clean clothing. For stubborn stains, however, pre-treatment proved to be useful in order to achieve optimum results. The skin compatibility of the wash ball was also confirmed. Our test subjects reported no allergic reactions and confirmed that the wash ball is suitable for sensitive skin. The preservation of colors and elasticity of clothing was also successfully proven. The colors remained intense even after several washes and the fabrics retained their elasticity. One promise that the manufacturer definitely keeps is the saving on detergent. The Thermostar wash ball makes the use of conventional detergent superfluous. Overall, we can confirm that the Thermostar wash ball largely fulfills its promises. The thorough cleaning, the skin compatibility, the preservation of colors and elasticity as well as the detergent savings make it a recommendable alternative for environmentally conscious consumers who are looking for an effective and sustainable solution for their laundry care

Price/performance ratio

and ratings from consumers

ℹ️ Finally, we examine how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

CriterionRemarkScore achieved*
Price / performance ratioappropriate70 points
Rating cutnot specified, as no ratings so far
Total70 points
Weighting: 15%
*The maximum score is 100 points

Prices of up to €38.70 are charged on the Internet for equivalent products. Very inexpensive products are available from as little as €5.95. The Thermostar wash ball is therefore currently in the upper price segment with a price of €39.90. The price-performance ratio is reasonable for the quality and performance received.

Overall result

WeightingScore achieved*
1. packaging & contents20%88 points
2. product processing & appearance20%100 points
3. in the practical test45%95 points
4. price/performance & consumer ratings15%70 points
Total88 points
*The maximum score is 100 points
Wash ball
of the brand
Thermostar
achieved
88
Points in our test and therefore passed. The test was carried out in the test period
08/23
and is stored in our database under the licence number
230712009
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observation and do not include long-term or laboratory tests. The test ratings reflect the opinion of our experts and are based on careful analysis. We would like to emphasize that these evaluations do not claim to be exhaustive and reflect both subjective and objective impressions. The assessments are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a reputable and thorough testing process, which has been developed in a long and professional process in close cooperation with our experts.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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