How we judge and rank

A judgment is only useful when you can see what made it. Here is what makes ours.

Where a verdict on cleaning machines comes from

Every judgment on this site is built the same way, and it is checkable line by line: we read the specifications, the manuals and the standards that apply to the machine, we weigh what long-term owners consistently report about it, and we name the source of every figure we publish.

That last rule is the one that does the work. A number with a source can be argued with; a number without one is decoration. Where a figure exists in a manual and contradicts the marketing, we quote the manual. Where no reliable figure exists at all, the page says so and leaves the field empty rather than filling it with something plausible.

What we weigh

We rank on the specifications that decide the job and the ones that decide how long a machine keeps doing it. In practice that means five things:

• Pressure quoted with its flow. The working bar figure, the liters per hour that go with it, and whether the number on the box is the peak measured with the trigger shut. A machine quoted at 160 bar without a flow figure has told you nothing, and we say so rather than repeating the number.
• Control where it is hardest. Softwood decking under a fan jet, grout without soaking the floor, edges and skirtings on a floor washer, a shower screen without streaks. Every category has one job that exposes a machine, and that is the one we describe.
• What the machine can damage. Which surfaces a nozzle marks, which floors steam lifts, whether a machine states a maximum inlet temperature, whether an ash vacuum is metal where it must be. This is weighted more heavily here than on most sites, deliberately.
• What it uses up, and whether it can be fixed. What filters, bags, pads, brushes and seals cost over a year; whether parts are sold separately; whether the hose fitting is a standard M22 thread or a proprietary bayonet. This is why a machine that cleans slightly worse sometimes outranks one that cleans better.
• Whether it ships to where you are. We verify each product reference market by market. A machine that is excellent but not distributed in your country is not a recommendation we can make to you.

Where the evidence on cleaning machines comes from

Three sources, weighted differently and always named. Manufacturer specifications and manuals, cited as such rather than repeated as fact — they are reliable for dimensions and unreliable for performance. Published standards and independent measurement where they exist. And the weight of long-term owner reports, which is the only practical source for the question that matters most: what is this machine like in year ten, after the warranty and after the honeymoon?

Where a claim rests on one source rather than three, the page says so. Where we could not source a figure at all, the field is left empty and the gap is stated. We never fill one in by inference.

What the ordering means

We publish no scores. There is no number out of ten on this site, and there never has been — a single figure would have to compare a 160 bar pressure washer with a packet of mop pads, and it cannot. What we publish instead is an order: within a category, the sequence is deliberate, and the reasons for it are in the text.

Hubs are sorted by price tier — entry, mid, then top — because a hub should read like a budget ladder, not a list with the most expensive machine nailed to the top.

The biases in cleaning machines we designed against

Affiliate sites drift towards expensive products, towards whatever is newest, and towards whatever converts. Our defense is structural rather than a promise: no ranking on this site has ever been reordered because of what a product pays, several pages recommend a bucket and a brush instead of a machine, and no product has ever been placed in exchange for anything.

The one bias we cannot remove is availability. We cover what is genuinely purchasable across Amazon's US, UK, German, French, Italian and Spanish stores, which means excellent machinery sold only through specialist dealers — a good deal of the serious European market — is under-represented here. Where that matters to the recommendation, the page says so.

Safety in cleaning machines is not a section, it is a constraint

A domestic pressure washer delivers a jet that can break skin and drive water and dirt underneath it — an injury that looks minor for an hour and is treated as an emergency — and steam leaves a boiler at close to a hundred degrees. Ash that looks cold keeps embers alive far longer than most people expect. No page here ranks a machine higher for making a guard easier to remove, and no procedure on this site replaces the manufacturer's instructions for your specific machine. Where a technique is commonly done unsafely, we describe the safe version or we do not describe it at all.