Urnex Grindz Grinder Cleaner 430g — The first and best-selling grinder cleaner worldwide
You empty your grinder's hopper, brushing the last beans out of the chamber. Then you open the Grindz container and pour 35 grams into the hopper – small, yellowish tablets in the shape of coffee beans. You start the grinding process. The tablets are crushed, you hear a different grinding sound than with beans, shorter and denser. Yellow particles, looking like ground cracker powder, trickle out of the spout. You repeat with a few beans to flush – the first ones still come out yellowish, the second ones clean dark brown. Done. Burrs and grinding chamber are free of coffee oils.
That's Grindz. Developed in June 2005 by Urnex in collaboration with Mahlkönig in Hamburg – and at the time, the world's first grinder cleaner ever. Pressed from grains, cereals, and pharmaceutical binders into coffee bean shapes. All-natural, food-safe, gluten-free (according to Urnex tests based on Codex Alimentarius standard), taste-neutral. A 430-gram container is sufficient for about 12 to 15 cleanings in a typical home espresso grinder. Made in the USA. We at Coffee Coaching Club are the exclusive Swiss importer for Urnex.
What Grindz resolves
During grinding, tiny amounts of coffee oil adhere to the grinding burrs and the inner wall of the grinding chamber. Over weeks and months, these oils become rancid – and rancid oils mix with each new grinding cycle. The result: a stale aftertaste in freshly ground coffee, even if the bean itself is freshly roasted.
Grindz works physically and chemically at the same time. During grinding, the tablets are crushed and penetrate into the same crevices and grooves where coffee oils have settled. The porous cereals absorb oils like a dry sponge. At the same time, they work mechanically – they gently abrade coffee residues from burr surfaces.
What makes Grindz special
No disassembly required
Grindz works without the need to open the grinder. Hopper in, start grinding, done. Anyone who owns a grinder like an Eureka Mignon Specialita, a Mahlkönig E64 WS or a Fiorenzato AllGround Sense Plus knows: disassembling is fiddly, and re-calibrating afterwards takes time. Grindz saves you that.
All-natural and gluten-free
Ingredients are grains, cereals, and pharmaceutical binders – all food-safe. Urnex has explicitly tested and confirmed the gluten-freeness according to Codex Alimentarius standards (max. 200 ppm). For medical celiac disease, we recommend contacting the manufacturer directly as a precaution.
Taste-neutral
After rinsing with normal beans, there are no residual flavors in the ground coffee. The next espresso tastes like the next espresso – no cracker note, no cleaning taste repetition.
Developed with Mahlkönig
Urnex tested Grindz in the development process together with the technical team at Mahlkönig in Hamburg – for safety, effectiveness, and burr compatibility across various grinder types.
Application
- Remove any remaining beans from the hopper
- For espresso grinders: 1 cap (35–40 g) of Grindz into the hopper
- For large shop grinders: 2 caps (70–80 g)
- Set grind size to "medium" (middle position for filter coffee)
- Start the grinder, let everything run through
- Wipe the hopper, spout, and doser with a brush or cloth
- Flush with double the amount of coffee beans – until no yellowish powder appears in the spout
- Re-calibrate grind size back to espresso setting (a small adjustment may be necessary)
Recommended frequency: once a month for normal home use, once a week for professional volumes. Urnex itself recommends one application per week in cafe operations – the recommendation scales with grinding volume.
Important: When Grindz must NOT be used
Not for automatic machine grinders
Grindz is not suitable for integrated grinders in automatic machines. Automatic machines have a brewing chamber that brings the ground coffee directly into contact with water – and Grindz tends to swell with larger amounts of water. This can clog the brewing chamber. For automatic machines, there is a separate Urnex product: SuperGrindz, specially formulated for integrated grinders with brewing chambers.
When in doubt: for grinders in the CCC range, ask the manufacturer or us beforehand. Grindz works with classic hopper and single-dose grinders like the Eureka Mignon Specialita, Mahlkönig X64 SD or Fiorenzato AllGround Sense Plus.
At a glance
| Application |
Cleaning of burrs and grinding chamber in espresso and filter grinders |
| Form |
Coffee bean-shaped tablets, yellowish |
| Ingredients |
Grains, cereals, pharmaceutical binders |
| Properties |
All-natural, food-safe, gluten-free (according to Codex Alimentarius), taste-neutral |
| Phosphate-free |
Yes |
| Dosage espresso grinder |
35–40 g (1 cap) |
| Dosage shop grinder |
70–80 g (2 caps) |
| Cleaning per application |
5–10 minutes including flushing |
| Yield |
approx. 12–15 cleanings for home grinders |
| Capacity |
430 g (15 oz) |
| Made in |
USA |
| Note |
NOT for automatic machine grinders with integrated brewing chamber |
Who benefits from Grindz
We see two profiles in the showroom:
Home setups with espresso grinders
Anyone using a hopper grinder like the Eureka Mignon Specialita from our Eureka Collection, a single-dose grinder like the Mahlkönig X64 SD from our Mahlkönig Collection or a grind-by-weight grinder like the Fiorenzato AllGround Sense Plus from our Fiorenzato Collection benefits from monthly Grindz application. Flavor improvement is immediately noticeable.
Specialty Cafes and Professional Bars
An Eureka Atom Specialty 65, a Mahlkönig E80 Supreme, a Mahlkönig EK43 S or a Fiorenzato F64 EVO Sense PRO processes so much espresso daily that a corresponding amount of coffee oil gets onto the burrs. Weekly Grindz application is standard in professional settings.
Multi-bean setups
Anyone switching between different beans – for example, an espresso grinder for Cozy Chocolate and at the same time a fruity bean like Wild Peach – can use Grindz to "switch" between aroma profiles without residues from the previous bean ending up in the second.
Matching companions
For the espresso machine: Urnex Cafiza 566g (industry standard) or the plant-based alternative Urnex BioCaf 500g. For the milk system: Urnex BioCaf Alkaline Milk Cleaner 1L. Grinders from the CCC range in our Grinder Collection or directly by brand in the Eureka, Mahlkönig or Fiorenzato Collection.
Order, delivery and advice
Grindz can be ordered online at Coffee Coaching Club or picked up at the showroom in Zurich Oerlikon or Bern. Delivery throughout Switzerland and to Liechtenstein in 2–4 working days. As the exclusive Swiss importer for Urnex, we are the Swiss point of contact for all grinder maintenance questions: office@coffeecoachingclub.ch.
Frequently Asked Questions
How does Grindz actually work?
When grinding, the coffee bean-shaped tablets are crushed and enter the same crevices and grooves where coffee oils settle. The porous cereals absorb oils like a dry sponge and mechanically abrade residues from the burrs.
Which grinders can I clean with Grindz?
All classic espresso and filter grinders – hopper grinders, single-dose grinders, grind-by-weight grinders, professional cafe grinders. Examples from the CCC range: Eureka Mignon, Eureka Atom, Mahlkönig X64 SD, Mahlkönig E64 WS, Mahlkönig E80 Supreme, Mahlkönig EK43, Fiorenzato AllGround Sense Plus, Fiorenzato F64 EVO Sense PRO. NOT suitable for automatic machines with integrated grinder and brewing chamber.
Is Urnex Grindz really gluten-free?
Urnex has explicitly tested the finished product according to Codex Alimentarius standards (max. 200 ppm gluten) and classified it as safe for gluten-sensitive individuals. For medical celiac disease, we recommend contacting the manufacturer directly before use.
How often should I clean the grinder with Grindz?
Home use with a few shots per day: once a month. Professional cafe volume: once a week.
Do I need to recalibrate the grind setting after use?
A small adjustment may be necessary because grinding residues have loosened and the burr distance has changed minimally. Rule of thumb: dial in the first 2-3 shots after Grindz application, then the grinder is reproducible again.
What is the difference to SuperGrindz?
SuperGrindz is the variant for integrated automatic machine grinders with a brewing chamber. The formula is designed not to swell on contact with water. Classic grinders without a brewing chamber need the standard Grindz.
How long does a 430g can last?
With monthly home use at 35–40 g per cleaning, approximately 12–15 uses, i.e., a good year. With weekly cafe use, about 3–4 months.
Can I see the product live before buying?
Yes. Both showrooms have the entire Urnex range on site: Bern at Gerberngasse 44 and Zurich Oerlikon at Hagenholzstrasse 50b.
Roastery Tip
An uncleaned grinder is the number one flavor killer in a home setup. My suggestion from showroom practice: make Grindz cleaning a monthly ritual, perhaps at the beginning or end of the month. Five minutes of effort, and you'll have clean burrs for 30 days. If you switch between different beans – for example, a week of Cozy Chocolate, then experiencing Wild Peach – you should perform a Grindz cycle between beans. Old chocolate oils in a fruity bean are like sunglasses at sunset: you miss the colors. A clean grinder is a prerequisite for truly tasting the roastery's work. This is my view from the roastery, one of many.
