Does it really keep full suction lying flat?

Yes — this is the S6 Stretch's engineering headline and owners confirm it. Most competitors that recline lose suction or stop the roller when horizontal; this one keeps cleaning at its 5.1-inch flat height, so under-bed dust and kitchen toe-kicks come clean. The trick is the fresh-water tank moving down onto the cleaning head, which is also why the head feels slightly weightier to push.

Why does the dirty tank say full when it's clearly not?

It's the design trade-off for the slim fold-flat body: the 720 ml dirty tank's geometry and float sensor register full at what looks like a quarter of the visible volume, and the machine halts until you empty it. Owners doing large hard-floor areas plan on two or three dump-and-rinse stops per session. Keeping the float sensor clean prevents the false-full readings from getting worse.

Does the self-clean actually prevent the smelly-roller problem?

Mostly, yes — the FlashDry cycle both washes and air-dries the roller at the dock, which addresses the root cause of the mildew smell older Tinecos develop. Owners still need to empty and rinse the dirty-water tank after each session (the dock can't do that part), but the dried roller is a real generational improvement over the S5's wash-only cycle.

Can it handle rugs or carpet?

No — like the rest of Tineco's Floor One line it's strictly for sealed hard floors, and running it onto a rug just wets it. Keep your regular vacuum for carpet. If your main floor has low-pile area rugs you want refreshed, the Bissell CrossWave HydroSteam is the floor washer with a genuine multi-surface rug mode.

How do I avoid streaks?

The three causes owners identify: a dirty roller, too much cleaning solution, and oversaturated passes. Run the self-clean cycle between rooms on grimy days, use less detergent than feels right (many owners run plain water for maintenance passes), and let the machine's suction do the drying rather than double-wetting. A cleaned roller plus light solution reliably leaves a streak-free, minutes-dry floor.

Is it worth the premium over the regular Floor One S5?

If anything in your home sits lower than a coffee table, yes — the S5 physically cannot reach under furniture and the Stretch S6 does it at full power, plus it edge-cleans on both sides and dries its own roller. The costs are a smaller effective dirty tank and a slightly heavier head. At typical prices ($300 vs $230-260) most owners consider it the obvious pick.

Hard Floor Washer

~$300

Tineco

Tineco Floor One Stretch S6

Name: Tineco Floor One Stretch S6
Brand: Tineco
Price: 300 USD
Availability: InStock

The Stretch S6 fixes the single biggest complaint about wet-dry mops: they can't get under anything. This one reclines a full 180 degrees and compresses to 5.1 inches tall, so it slides under beds, sofas, and kitchen toe-kicks that every other floor washer just bumps into — and unlike most competitors, it keeps full suction while lying flat. Cleaning performance on open floor is excellent for the class, with dual-sided edge cleaning that gets closer to baseboards than the older S5, and a 158°F FlashDry self-clean cycle that hot-washes and dries the roller at the dock so it doesn't sour between uses. Reviewers found it occasionally needs an extra pass on heavy dried-on messes compared with Tineco's pricier S7 line, and at 80 dB it's on the loud side. Like every machine in this category it's hard-floors only, and the dirty tank still wants a rinse after each session. If low furniture is why your floors never feel fully clean, this is the specific machine to buy; if you never clean under anything, the cheaper S5 does most of the same job.

Approx. price

~$300

Runtime

40 min

Filtration

HEPA

Best For

Hard-floor homes with lots of low furniture to clean under

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Specifications

Not disclosed

40 min

Yes

HEPA

Type

Hard Floor Washer

Noise Level

80 dB

Dustbin Capacity

0.72 L

Water Tank

800 ml

App Control

Yes

Weight

9.9 lbs

Warranty

2 years

Highlights

Lays flat to 5.1 in for under-furnitureFull suction while horizontal158°F FlashDry self-cleaning

Pros

✓Only mainstream floor washer that lies fully flat (5.1 in) without losing suction
✓Dual-sided edge cleaning gets within a whisker of baseboards
✓158°F hot-water FlashDry cycle keeps the roller from souring between uses
✓40-minute rated runtime covers a large main floor
✓iLoop sensor auto-boosts water and suction on heavier messes
✓Light for the class at about 9.9 lbs and easy to steer

Cons

✗Heavy dried-on messes can need a second pass versus Tineco's S7 line
✗Loud at 80 dB — noticeably more than the S5's 78 dB
✗Hard floors only; no carpet or rug mode
✗Dirty water tank still needs rinsing after every session
✗Street price swings widely ($270-$380) — wait for a dip

Owner Insights(25 discussions)

The Stretch S6 exists to fix the single biggest complaint about wet-dry mops — they can't get under anything — and owner sentiment says it delivers. The body reclines fully flat to about five inches tall while keeping full suction, so under beds, sofas, and kitchen toe-kicks get actually mopped for the first time. Owners are simply enthusiastic ('I have a Stretch S6 and love it' is the representative quote), and testers rate its one-pass cleaning and near-instant drying among the best in the class, with dual-sided edge cleaning that beats the older S5 along baseboards.

The compromise that makes the flat fold work is the one you'll live with: the slim dirty-water tank reads full at roughly a quarter capacity and halts until emptied, so whole-house sessions get interrupted more than S5 owners are used to. The fresh tank riding on the head adds a bit of push effort, streaks appear if you neglect the roller or overdose detergent, and the FlashDry dock — which washes then air-dries the roller, largely solving the classic Tineco stink — still wants the dirty tank rinsed after every session. It remains hard-floor-only, and Tineco's spotty warranty-service reputation carries over.

Buy the Stretch S6 over the standard S5 if furniture clearance matters — platform beds, low sofas, toe-kicks — and that's most homes; the $40-70 premium is easily worth it. Skip it only if your furniture sits high (the S5 is cheaper) or you want hot-water mopping and a bigger tank, where the Dreame H15 Pro Heat ($550) is the stronger machine. The Bissell CrossWave HydroSteam is the pick if area rugs are in the mix.

Pros

+The lie-flat trick is real and owners love it — the body reclines a full 180° down to about 5 inches tall and keeps full suction while flat, so under-bed and under-sofa floors finally get mopped instead of skipped
+Cleans most messes in one pass and leaves so little moisture that floors are dry moments later — reviewers call the squeegee-plus-suction finish notably better than older Tinecos
+Dual-sided edge cleaning gets closer to baseboards than the S5, cutting down the perimeter hand-wiping owners used to do
+FlashDry two-step self-clean washes and then air-dries the roller at the dock, which kills the damp-roller smell that plagues the S5 generation
+Around 40 minutes of runtime covers most homes' hard-floor area with charge to spare, and owners who cross-shopped call Tineco the better value against Dyson's wet offerings
+Built-in headlights and a light 9.9 lb body make it easy to see and steer under dark furniture
+Regularly on sale near $300, undercutting flagship floor washers by hundreds while carrying the category's newest party trick

Cons

−The dirty-water tank is the machine's tax for being slim — it registers full at what looks like a quarter-filled tank and shuts down until you empty it, so bigger cleaning sessions get interrupted repeatedly
−Hard floors only — no carpet, not even low-pile rugs, so like every Tineco it's a second appliance next to your vacuum
−Streaking shows up when the roller gets dirty or you overdo detergent — owners learn to run self-clean often and go easy on solution
−The fresh-water tank rides on the cleaning head to enable the flat fold, which adds pressure at the head — some owners find it slightly more effortful to push than top-heavy designs
−The usual Tineco maintenance ritual applies: empty and rinse the dirty tank every session, or the float sensor gunks up and the smell arrives
−Tineco's warranty support reputation carries over from the S5 era — failed units mean shipping costs and slow turnarounds in owner reports
−Discussion volume is thinner than for the S5, so long-term durability of the folding hinge is still an open question owners themselves raise