Observed Signal · Sep 24, 2026 · Funding · Source: Gründerszene (DACH Startups & Scaleups) · Impact: 1/5 · Sentiment: Positive
DHDL: Drain Cleaner Startup Dekadome Secures Deal with Ralf Dümmel
On the German TV show 'Die Höhle der Löwen' (Lion's Den), founders Anton Vrouzos and Marius Ludwig pitched Dekadome, a reusable mechanical drain cleaner that prevents clogs without chemicals. Instead of a standard investment offer, they used a spinning wheel to determine the deal terms, offering four options ranging from €30,000 for 15% to €60,000 for 30%. Despite skepticism from some investors, Janna Ensthaler and Ralf Dümmel both offered €60,000 for 30%. The founders chose Dümmel, and the deal was confirmed after the show. The product, retailing for €19.99, is now available online.
Minor news: a startup secures investment on a TV show, but the product (drain cleaner) is not directly relevant to AdTech/MarTech.
Track RTL Group Signals & Market Shifts in Real-Time
Polaris7 autonomous intelligence agents track regulatory filings, primary sources, executive changes, and deal flow 24/7. Create your free Explorer workspace to monitor these entities.
Key Takeaways & Evidence Grounding
- Dekadome founders Anton Vrouzos and Marius Ludwig appeared on 'Die Höhle der Löwen' to pitch their reusable drain cleaner.
- The founders used a spinning wheel to offer four investment options: €30k/15%, €40k/20%, €50k/25%, €60k/30%.
- Investors Janna Ensthaler and Ralf Dümmel each offered €60,000 for 30% equity.
- The founders accepted Ralf Dümmel's offer, and the deal was confirmed post-show.
- Dekadome is now available online for €19.99.
Connected Companies & Entities
1 Entity mapped“Image credit: RTL (the TV network airing the show)...”
Ontology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
Sauberkugel founders secure DHDL deal with Ralf Dümmel
Susanne and Bernd Schmekel, founders of Sauberkugel, a reusable cleaning product, appeared on the German TV show 'Die Höhle der Löwen' to seek €250,000 for their business. They have sold over 1.5 million units and generated approximately €8 million in revenue over eight years, with an 80% profit margin. Despite this success, they lacked staff and needed funds for production and retail expansion. Three investors made identical offers of €250,000 for 20% equity. The Schmekels chose Ralf Dümmel, who offered support for retail growth and scaling. Other investors, including Judith Williams and Andreas Herb, also competed, while Dagmar Wöhrl and Frank Thelen declined due to concerns about stagnation and lack of employees. The product is sold internationally, including in Germany, the USA, Japan, Taiwan, and Korea.
Two new investors join DHDL's 20th anniversary season
Vox investor Dagmar Wöhrl inadvertently revealed two new investors for the 20th season of the German founders' show Die Höhle der Löwen (DHDL). In an Instagram Story she shared behind-the-scenes footage that showed Andreas Herb and Johannes Kliesch; Wöhrl later deleted the Story. The additions were reported by Bild and have since been confirmed by the broadcaster. A Vox/RTL spokesperson said Herb and Kliesch will be part of the jubilee season airing this autumn and that further details about the panel will be announced later. Andreas Herb is identified as founder of the MBG Group (known for beverage brands such as Salitos and Effect); Johannes Kliesch is co-founder of the sock and underwear brand Snocks.
DHDL Deals Fail Due to Post-Show Due Diligence
Many founders who pitch on the German TV show 'Die Höhle der Löwen' (DHDL) fail to close deals with investors after filming. According to investors Janna Ensthaler and Frank Thelen, the on-air handshake is only the start of the real due diligence process. Post-show examinations of financials, product, market, contracts, and team often reveal fundamental differences in expectations about growth, strategy, or the investor's role. Ensthaler notes that some deals she was eager to do eventually fell through. Thelen emphasizes that walking away is a sign of entrepreneurial diligence, not failure, and that both founders and investors should part amicably if the partnership isn't right. Both investors stress that while some founders may seek TV exposure rather than investment, the majority are genuinely interested in a partnership. This process underscores the authenticity of the show, which involves real money and real responsibility.
Track Real-Time Market Signals & Shifts
Set up custom watchlists to receive automated, evidence-grounded executive digests whenever material signals or shifts occur across your tracked landscape.