Compact refillable spray bottle to lightly mist a small serving of beans.

The bottle is made of glass and can be refilled with water.

The included ABS holder helps protect the glass bottle.

Only bean in the hopper the weighed beans that you are going to grind immediately, if your grinder manufacturer allows this.
Zwarte RDT Spray van Barista Essentials op een witte achtergrond

Where does all that sticky coffee grounds come from?

When grinding, fine coffee can become statically charged. Then some of the grounds stick to the grinder or end up next to your portafilter. You'll notice this especially if you weigh out a portion of beans for every espresso.

  • Coffee sticks to the cup

    You empty the grounds catcher, but a thin layer of coffee grounds remains clinging to the wall.

  • Maalsel ends up next to the mill

    When you pour out the coffee, fine particles jump to the edge or the worktop.

  • You have to keep re-searching.

    After grinding, you first have to sweep coffee grounds off the spout and the counter.
Een fijne nevel uit de RDT Spray boven koffiebonen in een doseerbakje

A fine mist before you grind

My advice: first check whether the manufacturer of your coffee grinder permits it. If so, a very light mist of water on the weighed beans can help reduce static cling. It is a small extra step before grinding, not a substitute for grinder maintenance.

Who is this spray useful for?

For home baristas who weigh their beans for each brew, struggle with static coffee grounds, and use a grinder where RDT is permitted.

What is included with the RDT spray?

You get one refillable glass spray bottle with 8 ml capacity and a black ABS protective cover. A ceramic bean bowl can be used separately to shake your portion.

What does a little water do to static coffee?

Grinding creates friction. As a result, fine coffee particles can stick to surfaces. A minimal amount of water on whole beans before grinding can reduce that effect. The result depends on your grinder and the beans. Always check your grinder's manual first.

Rinse the beans; never spray directly into the coffee grinder.

  • Zwarte RDT Spray van Barista Essentials op een witte achtergrond
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Barista Essentials

A light mist before grinding: refillable 8 ml spray bottle

€9,95
€9,95
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View the 8 ml RDT spray View full details
Zwarte RDT Spray van Barista Essentials op een witte achtergrond

How to use RDT when grinding

Only start if your coffee grinder manufacturer allows this method. Follow three simple steps to keep water usage low and your coffee station tidy.

View the 8 ml RDT spray
  • Stap 1: Een man geniet thuis van koffie bij het keukenraam, met een groot cijfer 1 op de voorgrond.

    Weigh out your coffee beans

    Weigh the amount of beans for your espresso and place them in a suitable bowl. First, check whether your grinder manufacturer allows lightly moistening the beans.

  • Stap 2: Een man leest thuis de krant met een kop koffie, met een groot cijfer 2 op de voorgrond.

    Dispense a fine mist

    Give the beans a very light misting of water and shake them gently to distribute it. The beans should not be visibly wet or soaked.

  • Stap 3: Een espressomachine bereidt thuis een kop koffie, met een groot cijfer 3 op de voorgrond.

    Eat it and keep it clean

    What to do at step 3?
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Does RDT fit your mill, how much water do you use and what else do you need?

Frequently asked questions about the RDT spray

What does RDT mean when grinding coffee?

RDT stands for Ross Droplet Technique: you lightly moisten a weighed portion of whole coffee beans before grinding. This can reduce the static charge of the coffee grounds.

Can I use RDT with any coffee grinder?

You can't just assume that. First, check what the manufacturer of your grinder says about moisture in the beans. If they advise against RDT, do not use this technique.

How much water should I spray on the beans?

We're here to help you get the most out of your water sports adventures. Below, you'll find answers to some of the most frequently asked questions.

Does an RDT spray also help remove coffee residue from the grinder?

The spray is intended to reduce static cling during grinding. Baked-on or dry old coffee residue requires regular maintenance. For the exterior and your work surface, you can use a wooden coffee brush.

Does it also come with a dosing scoop?

No, the set consists of the glass spray bottle with the black holder. A ceramic bean bowl can be useful for gently shaking the beans after spraying.

I have another question...

You can contact Geert-Jan the Baristaman here

RDT spray for static coffee grounds

When grinding coffee beans, fine particles can become electrically charged. The grounds then stick to the catch cup or spread across the work surface. An RDT spray releases a fine mist of water onto the weighed beans before grinding. This refillable 8 ml version features a glass bottle and a black protective holder.

Only use RDT if your coffee grinder manufacturer allows it. You can shake the beans in a ceramic dosing bowl to distribute the mist. This helps maintain a smooth routine without extra mess.

Less clumpy coffee grounds?

With this small RDT spray, you can add a light mist of water to your single-dosing routine. First, check the suitability for your grinder, and then view the spray at Barista Essentials.

View the 8 ml RDT sprayQuestions? WhatsApp Geert-Jan!