Deep clean the burrs and grease the threads: Niche Duo

Before you start

Tools

hex driver (supplied), supplied brush, soft toothbrush, small screwdriver (to lift the springs), cotton or nitrile gloves, soft microfibre cloths, vacuum (optional)

Supplies

food-safe grease (a very light coat on the adjustment threads); coffee beans for purging (18 g, discarded after grinding)

Warnings

• No rice, cleaning tablets or other cleaning products through the grinder: they can damage the burrs. Source: Niche Duo instruction book (83F, 2024)
• Never immerse any part of the grinder in water; only the grind cup may be washed. Source: Niche Duo instruction book (83F, 2024)
• The burrs are very sharp: handle them with care and wear cotton gloves. Source: Niche Duo instruction book (83F, 2024)
• Never leave the inside wiped damp; dry it straight away. Source: Niche Coffee: How to easily clean your Niche Duo (Mar 2026)
• Keep the grind cup out of the dishwasher. Source: Niche Duo instruction book (83F, 2024)
• The chamber must be completely dry before the burrs go back in. Source: Niche Duo instruction book (83F, 2024)

Steps

1. Unplug the grinder from the mains.

   From the manual: “Never clean the grinder without unplugging it from the mains.”

2. Put the grind cup in place to catch loose grounds.

   From the manual: “put the cup in place to catch any loose grinds.”

3. Unscrew the bean hopper and set it aside.

   From the manual: “Unscrew and remove the hopper, placing it to one side.”

4. Lift out the upper burr and set it aside.

   From the manual: “Then lift out the upper burr and place it to the side.”

5. Hook out the three springs in the outer ring with a small screwdriver and keep them safe.

   From the manual: “hook out the three springs in the outer ring of the grinder”

6. Undo the lower burr with the hex driver and set it aside.

   From the manual: “Using the hex driver, unscrew the lower burr and put it to the side.”

7. Brush the grounds out of the chamber, then wipe it with a dry microfibre cloth.

   From the manual: “wipe the inner grind chamber with a dry microfibre cloth.”

8. Wearing gloves, clean the grinding faces of both burrs with a soft toothbrush.

   From the manual: “Use a soft toothbrush to clean the burr grinding surfaces.”

9. Clean the adjustment threads at the top of the chamber with a soft, dry toothbrush.

   From the manual: “Use a soft toothbrush to clean the adjustment threads at the top of the grind chamber.”

10. Give the threads a very light coat of food-safe grease.

    From the manual: “These should then be lightly greased using food-safe grease.”

11. Make sure the chamber is fully dry, then refit the lower burr and its screw, the springs and the upper burr.

    From the manual: “Replace the lower burr and screw, the springs, and the upper burr.”

12. Screw the bean hopper back on.

    From the manual: “Screw the bean hopper into place.”

13. Brush out the chute, then wipe inside it as high as you can with a microfibre cloth over a finger, and dry it.

    From the manual: “Use a soft microfibre cloth around a finger to clean the grind chute as high as possible.”

14. Finish as for the light clean: wipe and dry the body, cord and lid, and wash the grind cup.

    From the manual: “Follow steps 9 and 10 of the light clean to finish the deep clean.”

15. Grind 18 g of beans and throw the grounds away.

    From the manual: “run 18g of coffee beans through the grinder and discard.”

Sources

• Niche Coffee: How to easily clean your Niche Duo (Mar 2026) Maker’s page
• Niche Duo instruction book (83F, 2024) Manual

Researched on 2026-09-23.

Published: the sentence is on the maker’s own page or in the maker’s own document.

Applies to

• Niche Duo