The Ninja BL642 Nutri Ninja Personal and Countertop Blender Combo is a powerful kitchen multitool, combining high-capacity blending with nutrient extraction for smoothies, shakes, sauces, and more. With a 1200-watt motor, Total Crushing technology, and a set of personal cups, it’s built for daily use—but that also means it requires regular maintenance to perform its best.
For a complete breakdown of features, performance, and real-user feedback, explore our Ninja BL642 Nutri Ninja blender review.
Whether you use your Ninja BL642 daily or weekly, this article will walk you through every step of cleaning, upkeep, and troubleshooting.
Table of Contents
Introduction to the Ninja BL642 System
The Ninja BL642 includes:
- 72 oz. Total Crushing pitcher
- 18, 24, and 32 oz. Nutri Ninja cups with spout lids
- Pro extractor blades for smoothies and juices
- 1200-watt motor base with Auto-iQ presets
It combines countertop blending with personal portability, making it a favorite among meal preppers and smoothie lovers.
Why Maintenance is Essential
Regular cleaning and inspection:
- Prevent motor strain from building up
- Extend blade and gasket life
- Eliminate lingering odors and stains
- Ensure airtight seals to prevent leaks
- Improve hygiene and food safety
Neglecting maintenance may result in performance decline, gasket wear, or motor failure.
Daily Cleaning Routine
Quick cleaning keeps your BL642 fresh and ready:
- Unplug and Disassemble: Remove pitcher, cup, and blades.
- Rinse Immediately: Prevent residue buildup.
- Use Warm Soapy Water: Wash all parts except the motor base.
- Dishwasher-Safe Parts: Pitcher, cups, and lids are top-rack safe.
- Dry Thoroughly: Let air dry before reassembly.
Deep Cleaning: Pitcher, Cups, and Blades
Every few uses, follow this detailed routine:
Self-Clean Mode (Pitcher Only)
- Fill halfway with warm water and 1 drop of dish soap.
- Blend using “Pulse” for 20 seconds.
- Rinse thoroughly.
Manual Deep Clean
- Use a bottle brush for corners.
- Clean the blade base with soft-bristle brush.
- Remove and clean gaskets under cup lids (monthly).
Cleaning the Motor Base Safely
Never submerge the base. Instead:
- Wipe with a damp cloth.
- Use cotton swabs to clean button edges.
- Ensure the power cord area stays dry.
Check air vents monthly for dust and debris buildup.
Odor Removal and Descaling
Deodorize Cups and Pitcher
- Use a paste of lemon juice and baking soda.
- Let it sit 15 minutes before rinsing.
Remove Mineral Deposits
- Fill the container with a 3:1 water-vinegar mix.
- Let soak for 20–30 minutes.
- Scrub, rinse, and dry.
Avoid harsh chemicals or bleach.
Troubleshooting Common Blender Issues
Blender Won’t Start
- Check the lid and cup alignment.
- Make sure it’s clicked into place on the motor base.
- Let cool down if overheated.
Leaking Cups or Pitcher
- Inspect gaskets and seals.
- Avoid overtightening the blade assembly.
- Replace O-rings if damaged.
Strange Noises
- Check for trapped debris under the blades.
- Verify the blade isn’t worn or unbalanced.
Blade and Gasket Care Tips
- Rotate usage between the extractor and pitcher blades.
- Clean under gasket rings monthly.
- If the blade gets dull or rusted, replace it rather than sharpen.
Use only original Ninja parts to avoid damage or poor fit.
Recommended Maintenance Schedule
| Frequency | Task |
|---|---|
| After Use | Rinse and air dry all parts |
| Weekly | Deep clean cups, pitcher, and blades |
| Monthly | Descale pitcher, inspect gaskets |
| Quarterly | Check for wear, replace dull blades |
Set reminders in your phone or calendar.
When to Replace Parts
You may need new components if:
- Cups or pitcher develop cracks or cloudiness
- Blade assemblies feel loose or rattle
- Gaskets are torn or leaking
Where to Buy
- NinjaKitchen.com
- Amazon ( Ninja Blender BL642 )
- Walmart or appliance retailers
Warranty, Support, and Where to Buy Replacements
The Ninja BL642 usually includes a 1-year limited warranty.
How to Claim:
- Visit Ninja Support Website
- Register your product
- Describe the issue and upload any photos
Support is available by phone, email, and chat.
Frequently Asked Questions
Can I sharpen the blades?
No. Blade assemblies are not designed for sharpening. Replace them when dull.
Is the motor base waterproof?
No. Only wipe it with a damp cloth—never submerge it.
Why is my smoothie cup leaking?
Check the rubber gasket and blade base for proper sealing.
How often should I deep clean the blender?
Once a week for regular users, or monthly if occasional use.
Final Thoughts
Maintaining your Ninja BL642 ensures it lasts longer, runs smoother, and delivers the same nutrient-packed blends it did on day one. Regular cleaning, prompt troubleshooting, and periodic part replacement will help you get the most out of this high-performance blender.
Looking for other guides or comparisons? Explore our other blender maintenance and care tips!
