What the maker puts in writing
- “LOOSENS & LIFTS AWAY EMBEDDED MESSES: Restore carpets with CarpetXpert Technology, combining a high-speed brushroll, high-pressure PowerSpray, and Shark’s ultra-powerful suction for unbeatable deep carpet cleaning”*
- “20X MORE STAIN-REMOVING POWER: Unlike premixed chemicals that lose strength over time, StainStriker Technology fuses two formulas on contact”**
- “BUILT-IN SPOT & STAIN ELIMINATOR… The handheld spot & stain remover extends to quickly clean anywhere in your home—from carpets and stairs to upholstery, couches, and more”
- “GET BACK ON YOUR CARPETS FASTER: PowerSpray penetrates deep into fibers without oversoaking them, helping your carpets dry fast”
- “Dual Tank System keeps clean water and formula separate from dirty water”
- “WHAT’S INCLUDED: …3.5 inch Reversible Bristle Tool, Integrated Crevice tool, 7” Wide Path Tool, 12oz. Deep Clean Pro Formula, 16oz. OXY Multiplier Formula”
- **“*Shark CarpetXpert models vs. consumer carpet cleaners based on ASTM F2828 using included cleaning solution vs. Shark Deep Clean Pro Formula. ^When used as directed Shark cleaning solution”
- Catalog: 8187 g (288.8 oz) · 334 × 304 × 1105 mm (13.1 × 12 × 43.5 in)
This listing does something no other on the shelf manages: it says what each claim rests on, and the three are different.
The cleaning claim — “unbeatable deep carpet cleaning*” — is footnoted “*Shark CarpetXpert models vs. consumer carpet cleaners based on ASTM F2828 using included cleaning solution.”
ASTM F2828 is the published standard method for measuring soil removal from carpet: a defined soil, a defined carpet, a defined number of passes. It exists precisely so that “cleans better” can mean something.
The chemistry claim — “20X MORE STAIN-REMOVING POWER**” — is footnoted “**vs. Shark Deep Clean Pro Formula”, which is a comparison against the maker’s own single formula rather than against anyone else.
The odor claim carries a third condition: “^When used as directed Shark cleaning solution.”
What the rest of this shelf offers by comparison:
Bissell Little Green — “scientifically proven to lift and remove 100+ common messes”, no test named
*Bissell TurboClean PET and OXY — “outcleans the leading competitive lightweight carpet cleaner”**, no competitor and no test named
Hoover PowerScrub — “professional-level stain removal at home”
Hoover SmartWash — no cleaning claim at all
Dapper, $2400 — no cleaning claim either, but fifteen measured specifications instead
So: one standard citation, one set of real measurements, six assertions with nothing behind them.
Twenty times its own other bottle
The multiple is self-referential and the mechanism is not.
“Unlike premixed chemicals that lose strength over time, StainStriker Technology fuses two formulas on contact to unleash powerful OXY stain removal.”
Peroxide-based oxidisers are the active ingredient in OXY stain removers, and they begin decomposing the moment they are diluted and sealed in a bottle. A premixed carpet solution that has stood on a shelf for six months is genuinely weaker than the same chemistry mixed at the point of use.
So mixing in the machine is a sound answer to a real chemical problem. The 20× simply has no external reference — it is the two-part system against Shark’s own one-part system.
And the cost of that mechanism is in the box: two formulas, 12 oz Deep Clean Pro and 16 oz OXY Multiplier. Run it on the base formula alone and you have a conventional carpet cleaner.
At least seven of the fourteen listings here tie you to a branded bottle, and both Sharks tie you to two:
Shark CarpetXpert — 12 oz + 16 oz · Shark StainStriker — 16 oz + 32 oz · Hoover PowerScrub and SmartWash — Hoover solution · Bissell TurboClean OXY — two 8 oz bottles · Bissell Little Green — a “triple action formula”
The exception is the Dapper at $2400, which names no formula at all: a “cold water extraction system” takes whatever you choose.
One body, two machines
“Tackle carpets and area rugs in upright mode, then extend built-in StainStriker spot & stain remover and three versatile tools.”
This is the structural argument for the machine, and on this shelf it is a genuine saving.
Everywhere else you choose a form factor:
The portables — the Bissell Little Green at $129.99 and Shark’s own StainStriker at $149.99 — do spots, stairs and upholstery, and leave you on your knees for an open floor.
The uprights do floors, and reach above them only with a hose and tools: the Bissell OXY at $99.99 has none at all, the Bissell PET a 7 ft hose, both Hoovers 8 ft.
Here the spot cleaner is part of the machine and extends out of it, with three tools: a 3.5 inch reversible bristle tool, an integrated crevice tool, and a 7 inch wide path tool.
The practical difference between an extending built-in unit and a hose with a tool on the end is modest. The difference against buying two machines is about a hundred and fifty dollars.
Reversible bristle on the small tool is the detail worth noting: bristles out for carpet that needs agitation, bristles away for upholstery that does not.
It avoids over-wetting rather than drying afterwards
“PowerSpray penetrates deep into fibers without oversoaking them, helping your carpets dry fast.”
Two opposite strategies exist on this shelf and this is the better order of operations.
Both Hoovers heat the carpet after wetting it: “HeatForce technology provides faster drying.”
The Dapper heats the water at source, to 208.4 °F.
This puts less water in to begin with, using pressure rather than volume to get the solution into the pile.
Why that is the sounder approach: water that never goes into the carpet does not have to come out of it. Drying is the real complaint about this work — a carpet left wet smells, and in a cold room can grow mold — and the deepest cause of a slow dry is simply too much water laid down.
High-pressure spray puts solution where it is needed at lower volume. The Dapper quantifies the same idea at 120 PSI through a diaphragm pump; this publishes no pressure.
Three Bissells and the Shark portable publish nothing about drying at all.
Neither approach here comes with a dry time, so both are mechanisms without figures.
Dual tanks, and the odor claim
“Dual Tank System keeps clean water and formula separate from dirty water, so you get clean results and without spreading dirt back around.”
The architecture every serious machine on this shelf uses, and the reason they beat a bucket: dirty water never returns to the carpet.
What is missing is a capacity. Only three of eight listings publish one — the Bissell Little Green at 48 oz, the Hoover SmartWash at 96 oz, and the Dapper at 10.5 and 8 gallons.
The Dapper’s pair is the only informative capacity statement here: 10.5 gallons of solution against 8 of recovery implies about 76 per cent of what you spray comes back, the rest evaporating or staying in the fiber.
And the odor claim is worth taking at face value, with its condition attached: “Stubborn, lingering odors like smoke and pet urine aren’t just covered up, they’re trapped and removed.^”
A smell in a carpet is a residue. Masking it with fragrance leaves it there; extracting it removes it. That is the honest description of what any of these machines does when it works, and this listing is the one that puts it as a contrast rather than a promise.
What is not published
No brush speed. “A high-speed brushroll” is an adjective. The Dapper publishes 1500 RPM — the only speed anywhere on this shelf — the Hoover PowerScrub publishes five counter-rotating brushes, both Bissell TurboClean uprights a 4-row brush.
No suction figure. “Ultra-powerful suction” appears twice. The Dapper is the only machine here publishing the professional pair — 6.5 inches of water lift and 100 CFM — which together describe how deeply it pulls water out of a pile and how fast it moves it.
No spray pressure, where the Dapper publishes 120 PSI.
No tank capacity.
No dry time.
No hose length, which is odd given the extending spot cleaner — both Hoovers publish 8 ft, the Bissell PET 7 ft, the Dapper 10 ft.
No warranty, which only the Dapper publishes: two years parts and labor, with “parts in stock, phone troubleshooting first, and nationwide technician service if needed”.
And one note no listing on this shelf gives: use low-foam extraction solution only. Ordinary carpet shampoo foams enough to fill a recovery tank with bubbles and carry them into the motor — which is a particular risk on a machine whose selling point is mixing two chemicals at once.
Availability
Read on the day this page was built: $300 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-04. The live price is at the top of the page.