Quick Answer: The Bissell Little Green Max Pet (3860) is a $149.99 portable spot cleaner with matched 32-oz clean and dirty tanks, a 3-year parts-and-labor warranty, and a 4.4-out-of-5-star rating from 338 reviews on Bissell.com. It’s the right buy if you want a spot cleaner that won’t leave you stopping mid-job to empty a lopsided tank and you’re willing to pay roughly $40 more than the Hoover CleanSlate Pet for the longer warranty. Skip it only if price is the deciding factor or you need the CleanSlate’s wider 7-inch cleaning tool for open stretches of low-pile carpet.
Bissell’s original Little Green built a cult following as the machine that gets a couch stain out in a couple of minutes, and the Max Pet version is the current top-of-line model — same footprint, pet-specific tooling, and a suction bump Bissell says beats the category’s other big name. Here’s what that $149.99 actually buys, based on the machine’s published specs, Bissell’s own customer review data, and how it stacks up against its closest rival.
Little Green Max Pet, by the numbers
- 4.4 out of 5 stars — the customer rating from 338 reviews directly on Bissell.com (verified 2026-08-05), the largest review sample of any portable spot cleaner covered on this site.
- 30% more powerful suction — Bissell’s claim for the Little Green Max Pet versus the Shark StainStriker, based on ASTM F558 testing per Bissell’s product page. Bissell doesn’t disclose which StainStriker model it benchmarked, so read this as a marketing number, not an independent lab score.
- 32 oz / 32 oz — the matched clean and dirty water tank capacities, the spec that keeps you from stopping mid-job because one tank fills before the other runs dry.
- 8.2 lbs — the machine’s empty weight per Bissell’s spec sheet, the lightest carpet cleaner of any kind covered on this site.
What’s good
| Strength | Why it matters |
|---|---|
| Matched 32-oz tanks | No lopsided-tank problem — clean solution and dirty water run out at the same time |
| 3-year parts-and-labor warranty | A full year longer than the Hoover CleanSlate Pet's 2-year coverage |
| Pet Hair Removal Tool included | Separate from the Self-Cleaning Tough Stain Tool — built for embedded fur, not just liquid stains |
| 8.2 lbs | Easy to carry between floors, the car, and stairs one-handed |
| 4.4/5 stars, 338 reviews | A large, consistent satisfaction sample directly from Bissell.com |
What’s not
- $40-50 more than the Hoover CleanSlate Pet. At $149.99 (up to $159.99 at some retailers), it’s the pricier option in its class — the CleanSlate Pet runs $109.99.
- Narrower cleaning tool than the CleanSlate. Bissell doesn’t ship a wide-path attachment; Hoover’s 7-inch tool covers more surface per pass on open stretches of low-pile carpet.
- Smaller clean-solution tank than the CleanSlate. The CleanSlate’s 40-oz clean tank holds more solution per fill, even though its 23-oz dirty tank fills up sooner.
- Not a whole-room machine. Like every portable in this class, it’s built for spots, stairs, and upholstery — not a substitute for a full-size upright on wall-to-wall carpet.
Full specs
| Spec | Bissell Little Green Max Pet (3860) |
|---|---|
| Price (verified 2026-08-05) | $149.99 (Bissell.com), up to $159.99 elsewhere |
| Clean water tank | 32 oz |
| Dirty water tank | 32 oz |
| Weight | 8.2 lbs |
| Power cord | 15 ft |
| Hose length | 4.8 ft |
| Included tools | Self-Cleaning Tough Stain Tool, Pet Hair Removal Tool |
| Warranty | 3-year parts and labor |
| Customer rating | 4.4/5 (338 reviews, Bissell.com) |
Bissell Little Green Max Pet (3860)
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Who should buy it
Buy the Little Green Max Pet if you want a spot cleaner you’ll keep for years and don’t want to think about tank math mid-job — the matched 32/32 tanks and the extra warranty year over the CleanSlate Pet are the whole case. It’s also the stronger pick if pet hair, not just liquid stains, is the recurring problem, since the dedicated Pet Hair Removal Tool is purpose-built rather than a general-purpose attachment doing double duty.
Skip it if $40-50 is the deciding factor, or if you’re mostly covering wide stretches of low-pile carpet rather than tight spots — the CleanSlate Pet’s 7-inch tool and bigger clean-solution tank fit that job better. See the full spec-by-spec breakdown in our Little Green vs CleanSlate comparison, or step up to a full-size machine in our best carpet cleaner roundup if you’re cleaning whole rooms, not just spots.
The bottom line
The Bissell Little Green Max Pet earns its spot as our top portable pick largely on consistency: a 4.4-star rating across 338 reviews, matched tanks that avoid the lopsided-fill problem, and a warranty that beats every other machine in its class. It costs more than the Hoover CleanSlate Pet, and that’s the one real tradeoff — everything else about the Max Pet is a genuine upgrade over the category average. For pet households specifically, see our best carpet cleaner for pets guide for how it fits alongside a full-size machine, or our best portable carpet cleaner roundup to see it against the rest of the field.