What PowerWash Simulator Teaches About Cleaning Before a Sale

The most expensive smell I ever met at an open home was a kitchen extractor filter. The house was well priced, the photos were good, and the vendor had spent a weekend scrubbing. Nobody had touched the filter above the hob, and when the second couple through switched the fan on to test it, the whole ground floor smelled of old frying. They left in under ten minutes. The house sold three weeks later than the one two doors up, for a little less.

Vendors almost always clean before a sale. What they rarely do is clean the places buyers actually check. In twelve years of running viewings and calling a little over three hundred auctions, the gap between "looks clean" and "is clean where it counts" cost my clients more than any paint colour. Recently I found the best explanation of that gap in a game where you do nothing except blast dirt off things with a jet of water.

Why a cleaning game is so precise about dirt

PowerWash Simulator, from the UK studio FuturLab, came out of early access in July 2022. Each job hands you a filthy object, a van, a garden, a skate park, and a pressure washer with interchangeable nozzles. The screen shows a completion percentage for every part of the object, and when a part hits one hundred percent it gives a small chime and flashes white.

Here is the part that matters for anyone selling a house. The first eighty percent of a job goes fast, wide sweeps with a 40 degree nozzle. The final few percent take as long as everything before it. A wheel arch sits at 97 percent and you cannot see why. Players have a name for this hunt, and the game even added a highlight tool that makes the remaining grime glow so you can find it.

Real houses work the same way, minus the glow. You clean the obvious surfaces in a weekend. Then there are the corners nobody thinks about, and those are exactly where a buyer's eye lands, because a buyer is not admiring your floor. A buyer is looking for reasons the price might be too high.

Where buyers actually look

I kept notes on this for years, partly from watching people and partly from what they said to me on the way out. These are the spots that came up again and again, with my rough sense of how often each one was mentioned in feedback at the viewings I ran. Treat the numbers as one agent's notebook, not a survey.

The front path deserves its own line. It is the first surface a buyer touches and almost no one mentions it in feedback, yet in the games it is the part players clean first because it is so satisfying to watch the stripe appear. I have come to think that instinct is right for a sale too.

The nozzle lesson most vendors skip

Common advice says to hire or buy a pressure washer and blitz the outside. I would push back on that, and the game itself hints at why. In PowerWash Simulator the narrow 0 degree nozzle strips grime fastest but leaves visible lines if you get impatient, so experienced players switch to wider tips for finishing. On a real house the stakes are higher than visible lines.

A high pressure jet held close to soft sandstone, old lime mortar or cheap softwood decking can etch the surface permanently. I watched one vendor clean a 1930s brick path so hard that the mortar between the bricks washed out and the path looked older than before he started. The repoint cost more than the professional clean he had tried to avoid. If you do it yourself, start with the widest nozzle, keep your distance, and test a hidden corner first.

Inside, the equivalent mistake is harsh chemicals on surfaces that only needed patience. Bleach on coloured grout can leave a patchy result that looks worse in daylight photos than the original dirt.

Thinking in percentages, not rooms

The habit worth stealing from the game is the per part score. Instead of "the bathroom is done", break each room into its parts and score them honestly. Mirror, 100. Taps, 100. Screen, 90. Grout behind the toilet, 60. Once you see the numbers, you stop declaring a room finished when it is only finished from the doorway.

I gave this method to a client last spring, a retired teacher selling a terraced house with three bedrooms. She printed a sheet per room and went through it with a torch, because low angle light shows smears the way the game's highlight tool does. She found 31 spots she had missed. It took her about nine extra hours spread over a week. The house drew two offers at the first open home, and I am honest enough to say I cannot prove the cleaning caused that. I can say no one walked out early.

The torch trick is the closest thing in real life to the game's glowing grime. Hold a phone light almost flat against a surface and every streak and drip shows up.

When paying a cleaner makes sense

A game makes the last few percent feel like a reward. Real cleaning makes it feel like a chore, and tired vendors miss things. If you work full time and the house goes on the market in under two weeks, a professional end of tenancy style clean is usually money well spent, partly because cleaners bring their own checklist and do not get bored at 97 percent. If you have more time and a decent eye, do it yourself and pay only for the oven and the windows, the two jobs most people do badly. For staging once the cleaning is done, see what room staging in games teaches about selling, and for why the before and after loop feels so good, why house flipping games are so satisfying.

One job for this week

Pick one room you think is already clean. Wait until evening, turn off the main light, and go over every surface with a phone torch held low. Write down each spot you find and give the room an honest percentage. If it is under 95, you have found what a buyer would have found first. More on preparing a house for market is in our selling guides.