If your main problem is fresh pet accidents, everyday spills, or small couch and carpet stains, the regular BISSELL Little Green 1400B is probably enough.
The HydroSteam 3618 is more capable, but its higher price makes more sense when you regularly deal with sticky, oily, stubborn, or mixed household messes and will actually use the extra cleaning modes.
Choose Little Green for fresh pet messes, quick spot cleaning, lighter weight, and better value.
Choose HydroSteam if tougher stains are common enough to justify Steam, Wash, SteamWash, and the larger tank.
At BISSELL’s listed prices during research, Little Green was $129.99 and HydroSteam was $249.99. More features are only worth paying for when they solve a problem you actually have. [1][2]
Which One Fits Your Cleaning Problem?
You mainly need a quick localized cleanup.
You regularly clean more than simple pet accidents.
Weight, storage, and easy grab-and-go use matter.
A bigger tank and extra cleaning options help more.
Better value for fresh pet accidents and quick spot cleaning.
Shop Little GreenWhat Are You Paying Extra for With HydroSteam?
Both machines apply cleaning solution and recover dirty liquid from carpet and upholstery. HydroSteam mainly adds Wash, Steam, and SteamWash modes.
BISSELL describes Wash Mode for spills and pet accidents, while SteamWash is aimed at tougher oily and sticky stains. Its claim of up to 50% better cleaning applies to tough oily stains in SteamWash mode — not every stain and not specifically pet urine. [2]
| What Matters | Little Green 1400B | HydroSteam 3618 |
|---|---|---|
| Official BISSELL price* | $129.99 | $249.99 |
| Clean-water tank | 48 oz | 64 oz |
| Weight | 9.65 lb | 13 lb |
| Hose | 4 ft | 4.8 ft |
| Cleaning style | Spray, scrub, extract | Wash, Steam, SteamWash |
| Better fit for | Fresh pet accidents and quick spots | Tougher and more varied messes |
Do You Need HydroSteam for a Fresh Pet Accident?
Usually, no. For a fresh, localized pet accident, the regular Little Green already gives you the basic process that matters: apply solution, work the affected area, and extract dirty liquid.
BISSELL markets the 1400B for pet messes, carpet, upholstery, stairs, and vehicle interiors. [1] Good Housekeeping also found it effective at removing wet spills and fresh or relatively recent stains, although older stubborn stains could need more treatment. [3]
Neither machine should be treated as a guaranteed fix for urine that has soaked through carpet backing, padding, or deep cushion foam. A portable extractor can clean the reachable area, but deeper contamination may need additional treatment.
The regular Little Green is the easier value choice.
Shop BISSELL Little GreenWhen Does HydroSteam Make More Sense?
HydroSteam makes more sense when pet accidents are only one part of what you clean.
If you also deal with sticky food stains, oily messes, older upholstery stains, car interiors, or several stains in one session, its extra capability becomes easier to justify.
- Sticky food spills
- Oily or greasy stains
- Older stubborn spots
- Car seats and interiors
- Several stains at once
- Larger upholstery areas
Good Housekeeping named HydroSteam its Best Overall portable carpet cleaner in its 2026 testing, where cleaners were evaluated for performance, usability, and maintenance. [4]
That supports HydroSteam as a capable cleaner, but it still does not mean every household needs to pay more for it.
That is where HydroSteam’s extra modes and larger tank start making practical sense.
Shop BISSELL HydroSteamThe Weight Difference Matters More Than It Looks
Little Green weighs 9.65 lb, while HydroSteam weighs 13 lb. [1][2]
A lighter cleaner is easier to grab for sudden accidents, carry upstairs, and store in a smaller home. HydroSteam gives you more capacity and cleaning options, but you also have more machine to carry.
Little Green → portability and simplicity.
HydroSteam → versatility and extra cleaning options.
Is Steam Worth Paying More For?
The useful question is not: “Which one has more features?”
Ask: “Will I use the extra features often enough to justify the extra cost?”
A recent Reddit purchase-advice discussion showed the same concern: a dog owner in a small apartment was comparing BISSELL portable cleaners and questioning whether HydroSteam’s steam feature justified paying more. [5]
If SteamWash, the larger tank, and extra modes match stains you regularly deal with, the upgrade can make sense. If most of your cleaning is an occasional pet accident or couch spill, Little Green is the more logical buy.
Which BISSELL Little Green Should You Buy?
BISSELL Little Green 1400B
Best for: fresh pet accidents, couch spots, carpet stains, apartment living, and quick cleanups.
- 9.65 lb: easier to carry and store
- 48 oz tank: practical for quick localized jobs
- Simple cleaning: spray, scrub, and extract
BISSELL Little Green HydroSteam 3618
Best for: homes dealing with pet accidents plus sticky, oily, stubborn, or more varied stains.
- 64 oz tank: fewer refill stops
- 3 modes: Wash, Steam, and SteamWash
- SteamWash: aimed at tougher oily and sticky stains
Final Verdict: Buy for Your Real Messes, Not the Feature List
HydroSteam is the more versatile machine. Little Green is the better-value choice for simpler spot-cleaning needs.
If your main goal is handling fresh pet accidents, muddy paws, couch spots, and everyday carpet spills, Little Green already covers that job while staying lighter and cheaper.
If you regularly clean oily food stains, sticky messes, stubborn upholstery, car interiors, and several different types of stains, HydroSteam’s extra modes and larger tank become easier to justify.
Mostly fresh pet and everyday spot messes → Little Green.
Frequent tougher, sticky, oily, or mixed messes → HydroSteam.
Frequently Asked Questions
Is HydroSteam automatically better for pet urine?
Is HydroSteam worth the extra money?
It is easier to justify if you regularly clean sticky, oily, stubborn, or mixed stains and expect to use its extra modes. For ordinary pet accidents and small spills, Little Green offers the stronger value case.
Which model is better for a small apartment?
Which model is better for car interiors?
Both can handle localized vehicle cleaning. HydroSteam becomes more attractive for regular car cleaning because its larger tank and slightly longer hose can reduce interruptions. For occasional seat stains, Little Green may still be enough.
Sources & references
- BISSELL — Little Green Portable Carpet & Upholstery Cleaner 1400B Open source ↗
- BISSELL — Little Green HydroSteam Pet Portable Carpet Cleaner 3618 Open source ↗
- Good Housekeeping — BISSELL Little Green hands-on review Open source ↗
- Good Housekeeping — 2026 portable carpet-cleaner testing Open source ↗
- Reddit / r/VacuumCleaners — portable cleaner purchase-advice discussion Open source ↗
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