E65S GBW Deep Clean | Keep Your Mahlkönig Grinder Accurate

E65S GBW Deep Clean | Keep Your Mahlkönig Grinder Accurate

E65S GBW Deep Clean

Keep Your Mahlkönig Grinder Accurate & Consistent

The Mahlkönig E65S GBW is one of the most accurate espresso grinders on the market — but only when it’s kept clean.
Because it doses by weight, not time, even small amounts of retained coffee or buildup can lead to drifting doses and inconsistent extractions.

In this guide, we’ll walk through how and why to deep clean your E65S GBW, and how doing it regularly protects both coffee quality and grinder accuracy.

Why Deep Cleaning the E65S GBW Matters

A daily brush-out isn’t enough forever. Over time, coffee oils and fines build up inside the burr chamber, chute, and around the grind-by-weight components.

A proper deep clean helps to:

  • ⚖️ Maintain accurate dosing

  • ☕ Improve flavour clarity and consistency

  • ⚙️ Reduce grinder strain and burr wear

  • 🔧 Prevent calibration drift

  • 👩🍳 Make daily dial-in faster and easier

For busy cafés, this is essential preventative maintenance.

How Often Should You Deep Clean?

We recommend:

  • ✅ Daily: Light clean (brush chute, wipe forks)

  • ✅ Weekly: Remove hopper and clean burr chamber

  • ✅ Monthly (or as needed): Full deep clean

If you notice dose variance or stale flavours, it’s probably time.

What You’ll Need

Before starting, make sure you have:

  • Grinder brush

  • Vacuum (optional but helpful)

  • Clean, dry cloth

  • Empty hopper

  • Time (10–15 minutes)

⚠️ Always ensure the grinder is off and unplugged before opening.

Step-by-Step: E65S GBW Deep Clean

1. Empty the Hopper

  • Remove all beans

  • Run the grinder briefly to clear remaining coffee

This prevents beans falling into the burr chamber during cleaning.

2. Remove the Hopper

  • Lift off the hopper

  • Wipe the inside to remove oils and residue

Old oils inside the hopper can taint fresh coffee.

3. Access the Burr Chamber

  • Adjust the grind coarser to relieve burr pressure

  • Remove the top burr carrier as per manufacturer guidance

Take note of your grind setting before removing parts.

4. Clean the Burrs & Chamber

  • Brush out loose coffee from burrs and chamber

  • Vacuum fines if needed

  • Wipe surrounding surfaces with a dry cloth

Avoid water or chemicals inside the grinder.

5. Clean the Chute & Fork Area

  • Brush and wipe the grind chute

  • Ensure no compacted grounds remain

  • Clean the portafilter fork and surrounding surfaces

This area directly affects grind flow and dosing accuracy.

6. Reassemble the Grinder

  • Refit the burr carrier and hopper

  • Reset your grind to the previous position

  • Refill with fresh beans

7. Check Calibration & Dosing

  • Pull a test dose

  • Weigh the output

  • Recalibrate the GBW system if needed

A clean grinder often needs a slight grind adjustment.

Common Mistakes to Avoid

  • Using water or cleaning chemicals internally

  • Forgetting to note grind position before removal

  • Not recalibrating after cleaning

  • Skipping deep cleans because “it still tastes fine”

Clean grinders don’t just taste better — they work better.

Make It Part of Your Routine

A clean E65S GBW:

  • Delivers consistent doses

  • Reduces waste

  • Makes dial-ling in easier

  • Protects a serious investment

Deep cleaning isn’t a fix — it’s good barista practice.

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