Is there any way to reduce the effects of static electricity on the grounds in a Capresso conical burr stainless steel grinder? The grounds appear to be charged and tend to stick to the plastic when emptying the container.


Try putting a couple of drops of water in your coffee beans before putting them in the grinder's hopper. Known as the Ross Droplet Technique.

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  • Wow - I will try this out! – Peter H Mar 5 '16 at 0:20

As an electrical engineer for any kind of such problems I can advise proper ground. I mean the electrical one this time. :) Anti static gloves may help (Google it). However, the static electricity always occurs by friction, it's natural and you cannot get rid of it completely.

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I have the same grinder, and I find that the static builds up more with the amount you grind. For everyday AeroPress use, I don't grind enough per use for it to build up static, but when I cold brew a whole 12oz of coffee, I grind the whole bag in batches. This builds up a lot of static due the the bin being plastic, and it's annoying to clean as it flies all over the counter.

I wouldn't recommend using water on the beans before grinding because even though the burr grinder is stainless steel, it is not rust-proof. So thinking long term, I would simply recommend keeping the batch size lower than the max line on the plastic bin. I wouldn't use water to clean the steel grinder either. Only use a brush and you can even pre-grind a tiny amount of throw-away grounds to clear the old grounds out.

A clean up is usually in the cards for when I make coffee anyways, and a little bit of grounds isn't going to trip me up, but I share your frustration.

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  • 1
    agreed about the corrosion; the droplets of water have solved the static problem but I don't think it is worth getting the burrs rusted. – Peter H Mar 25 '16 at 3:21

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