Introduction
The BISSELL Little Green Max Pet Portable Carpet and Upholstery Deep Cleaner, Model 3860B, is designed for effective spot and stain removal on carpets, upholstery, and car interiors. This lightweight and portable machine combines powerful suction with scrubbing action to tackle tough pet messes and odors. Its dual tank system keeps clean and dirty water separate, ensuring a thorough clean every time.
What's in the Box
Your BISSELL Little Green Max Pet cleaner includes the following components:
- Self-cleaning Tough Stain Tool
- Pet Hair Removal Tool
- 8 oz. trial size BISSELL® PET PRO OXY Spot & Stain formula
Setup
Filling the Clean Water Tank
- Remove the clean water tank from the unit.
- Unscrew the cap at the bottom of the tank.
- Fill the tank with warm tap water up to the water fill line.
- Add the BISSELL PET PRO OXY Spot & Stain formula up to the formula fill line.
- Securely replace the cap and reattach the tank to the unit.

Image: Filling the clean water tank with water and BISSELL PET PRO OXY Spot & Stain formula.
Operating Instructions
Spot and Stain Removal
- Plug the unit into a grounded outlet.
- Attach the desired cleaning tool (Self-cleaning Tough Stain Tool or Pet Hair Removal Tool) to the end of the hose.
- Turn on the power switch.
- Position the cleaning tool directly over the stained area. Press the spray trigger to apply cleaning solution, ensuring the stain is thoroughly saturated.
- Gently scrub the stain with the brush on the cleaning tool.
- Release the spray trigger and tilt the tool to use the powerful suction to lift the dirty solution and stain from the surface. Continue until no more dirty water is being extracted.

Image: Demonstrating superior suction power to remove stains from carpet.
Cleaning Hard-to-Reach Areas
The BISSELL Little Green Max Pet features an extended hose and cord, providing excellent reach for cleaning various surfaces. This allows you to easily clean:
- Car interiors (seats, floor mats)
- Stairs
- Upholstery (sofas, chairs)
- Pet beds

Image: The portable cleaner offers grab-and-go convenience for cleaning auto interiors and upholstery.
Self-Cleaning Tough Stain Tool
The innovative Self-cleaning Tough Stain Tool simplifies post-cleaning maintenance. After you've finished cleaning your surfaces, attach the tool to the hose and activate the one-touch cleanout function. This flushes out any remaining residue, debris, and pet hair from the hose and tool, ensuring they remain clean and ready for the next use, and helps maintain consistent suction performance over time.

Image: The self-cleaning tough stain tool rinses out residue, dirt, and debris with a one-touch hose and tool cleanout.
Maintenance
Emptying and Rinsing Tanks
- After each use, remove the dirty water tank from the unit.
- Carefully empty the dirty water into a sink or toilet.
- Rinse both the dirty water tank and the clean water tank with clean water.
- Allow both tanks to air dry before reassembling them on the unit.
Cleaning Tools
Rinse all cleaning tools under running water to remove any remaining dirt or debris. Store them in their designated spots on the unit.
Troubleshooting
If you encounter any issues with your BISSELL Little Green Max Pet cleaner, please refer to the comprehensive user manual for detailed troubleshooting steps. For further assistance, contact BISSELL customer support.
Specifications
| Specification | Detail |
|---|---|
| Brand | Bissell |
| Model Name | Little Green Max Pet |
| Model Number | 3860B |
| Item Weight | 8.2 Pounds |
| Color | Titanium/Green |
| Capacity | 227 g |
| Power Source | Battery Powered |
| Included Components | Self-cleaning Tough Stain Tool, Pet Hair Removal Tool, 8 oz. trial size BISSELL® PET PRO OXY Spot & Stain |
Warranty & Support
The BISSELL Little Green Max Pet Portable Carpet and Upholstery Deep Cleaner comes with a 3-year warranty. For warranty claims, product registration, or additional support, please visit the official Bissell website or contact their customer service department.