Asger started working as a window cleaner during his gap year in 2013 at a large Danish company, where he later also worked in the administration.

There, he gained solid experience in the industry, and since he was paid by performance, efficiency quickly became a key focus.

He began using larger tools and cleaning with both hands – something many in the industry considered impossible. But the logic is simple: bigger tools and two hands mean faster work – and a significantly higher hourly wage.

At 20, Asger had bigger dreams than becoming a cleaner – he wanted to build a dating app. He signed a development deal worth one million DKK, thinking he’d raise the money afterward. But raising capital in the dating space as a 20-year-old proved more difficult than expected. So, he took matters into his own hands and became his own investor by starting a window cleaning business. With one clear goal: to work as efficiently as possible – both in getting and serving customers – without compromising on quality. And just like that, he became his own investor through his window cleaning company.

The million was saved up in just 5 months. During that period, every single day for Asger looked the same: wake up, go out and clean windows for 6–8 hours, head home, work on Ruumble, work out, go to bed – and repeat. Once the debt was paid off, the phone in the window cleaning company was turned off. Now it was time to go all in on Ruumble... and like any other software startup, you end up needing more money than expected. So what happened? Ruumble needed another million. So what did Asger do? He fired up the window cleaning company again – and turned off the phone once more, once the next million had been saved up and invested into the project. Ruumble ended up reaching a total of 60,000 users in Denmark – during the same period, Tinder had 80,000 in denmark

One might wonder why Asger didn’t just hire people to take over his window cleaning routes, allowing him to earn a passive income while focusing on other projects. However, finding qualified workers in the window cleaning industry has always been a challenge. The craft is harder than most people think, and there are countless levels when it comes to both execution and earnings. There have been schools for carpenters, painters, and bricklayers for many years – but never a window cleaning school.

A few years later, Asger revisited the idea of starting a window cleaning school, this time in partnership with the state. He teamed up with his childhood friend Jonas and Oliver, whom he had trained back in 2015. Both had worked full-time in the industry for years. The Window Cleaning School launched as a vocational program to solve the lack of skilled labor. Municipalities were offered a job guarantee: “Citizen gets a job – or your money back.” Over 100 students became certified professionals. Despite growing interest in entrepreneurship, the school couldn’t offer business guidance, and instructors weren’t allowed to own window cleaning companies – it was considered a conflict of interest.

The school was privatized. For the first time ever, we had to market ourselves publicly – and we weren’t going to play it safe. The video had to provoke. It had to make window cleaning sexy. The first TikTok got 33,000 views. Asger showed how much money you could actually make. No one believed it. The first 5 students got the full education for a startup price of 10,000 DKK (15,700 SEK). They were only convinced after 300+ hours of conversations – with people who didn’t believe in us at all.

Ulrik from Hareskov Vinduespudsning was the first to invest his savings – 10,000 DKK (15,700 SEK). – into the program. Today, he owns a million-kroner company. Four others followed his lead. Our goal was to make the school so attractive that we could choose the right candidates – without spending countless hours trying to convince them. Ulrik and four others jumped in! We knew that if our students became successful, more would follow. The industry needed to be made sexy – but we knew it would take time...

We already had the physical school in Copenhagen (Frederikssundsvej 345) and detailed training protocols in place. Asger had made millions from window cleaning – but he’d never taught others full-time how to build a business. After one week, none of the five students had made a single sale. Just excuses. So Asger took charge. He found five customers in one hour and handed the addresses to the students. “The work is done – now bring me the money.” While the students cleaned, Asger kept selling – and took all the earnings. It was a demonstration. The result? The next day, all five students showed up late… because they’d been out selling. Motivation unlocked.

We learned how to teach – not just do.We documented everything to build the perfect program.There’s a big difference between being successful and teaching others to be.Every student hit over 600 DKK/hour in revenue, so we made it our guarantee.The price became two payments of 10,000 DKK. (30.000 sek total)23 new students enrolled.We were still learning who to accept and how to teach best.We worked around the clock – because you can’t make others rich without earning something yourself.

One year later, the Window Cleaning School has trained 127 people. The School now costs 4 payments of 10,000 DKK (62,800 SEK) and includes thousands of hours of teaching experience. We keep breaking our own records in student success. What we’ve done well is simple: Every time students needed something – we built it. And gave it to everyone. Meanwhile, we built a data tracker app. Now every student logs their time and results across all strategies. This allows us to instantly see what works best – across companies, students, and cities. Success isn’t random anymore. It’s mapped.

The longer we run the School, the faster students hit a million in revenue. Some make over 100,000 DKK (157.000 SEK)/month profit solo. Others scale to teams and multi-million revenue. We knew it was possible — but didn’t expect that 20% of our students would go from zero to million-kroner businesses in just 1.5 years. All thanks to data and constant optimization. The more students we train, the smarter we all get.

It’s no secret: this isn’t just out of goodwill. The school works best when students succeed. Why? Because when they succeed, they start hiring. And guess where their staff gets trained? At the school. One student becomes four. And over time – more than a hundred. 2024 was the year we really started to feel it. For the first time, several months saw more new employees join the School than brand-new self-employed students. The ripple effect is real.

All of our students reach the top 1% income bracket in their age group – in less than a year of full-time growth (even if that’s not everyone’s personal goal). Many no longer clean windows themselves – their employees do. That’s something we’re deeply proud and humbled by. Looking back, one of our biggest goals was to make the industry sexy – and we genuinely feel it’s happening. Today, consultants and outsiders want in. Two years ago, no one cared. Our 300+ students now generate over 150 million DKK/year in combined revenue. We launched a new data tracking web app – and with it, our 1 million DKK guarantee after just 14 months of dedicated growth. We've welcomed students who couldn’t even afford 20% of the tuition upfront – and who now make enough to buy the program several times over… each month. We keep raising the bar. Not long ago, people thought we were insane for promising 100,000 DKK/month. Now? That’s just the beginning. And a price increase to 60,000 DKK (94.000 sek) is just around the corner

In 2025, we’ve decided to launch in Sweden. Instead of setting up a government partnership or a physical school, we’re choosing to invest in 10 guys in selected cities across Sweden. We take a small revenue share in the business – which means you can get started for free, and all of us have the same goal: to grow the company’s revenue quickly.