Niche Zero - burr removal and retention 

I think they were some kind of highly polished aluminium alloy.

Just a light smear of silicone lube, or a foodsafe ptfe dry lube.

I think if it makes them feel better fair enough...as probably less than 0.3g of coffee exchanges each time you grind...which is about 1 coffee bean..it's sort of pointless and once you start doing it, you probably feel you want to keep doing it. Just using the Niche as the manufacturer intended works perfectly well, and you won't taste the difference.

It's a long time ago, but probably 2 weeks. Retention peaks after around 3 or 4 grinds, so really won't increase after weeks or months.

I did a little video about it, you will have to have a look through. Sadly they don't make them any more...they were only £8, I have seen similar for a LOT more.

@@DaveCorbey Thanks!

I don't think the power down noise is anything to be worried about. The outer burr has to touch the inner wall at some point and when the grind is made coarser or finer a witness mark will be left on the wall of the grinder. If this is what you mean I don't believe you have a problem. If you are still concerned I suggest you contact Niche and see what they say and also if you want reassurance about the noise. Don't forget to include some audio or video for them.

Dave Corbey You told me exactly what Niche said. Thank you Dave! They told me that’s normal.

Turning the burrs with the nut won't ruin anything. Once the silver funnel is removed the top burr simply lifts out. It can be hard to get a grip on it. I put 2 fingers in and apply outward pressure to grip the inside of the top burr, then pull it out.

@@DaveCorbey Hi Dave. Things are going pretty well with my Niche. I installed the disc and it works even better. There's one thing I am nervous about, which is that I accidentally turned it on while it was practically on calibrate. It was only for a few moments. I haven't noticed any issues but I guess I am just looking for a bit more reassurance from an expert. Would there be any problem if this happens once or twice briefly? Also, how much past 0 can one go/how close to calibrated is okay? Mostly just curious at this point but would be nice to know I haven't damaged my Niche with my incompetence. Thanks for your patience in reading my questions! Kind regards.

@@excellerateurbreath it will be fine don't worry. As for calibration, it's just to help you get the numbers shown for you grind level similar to others and get u started.

Yes, don't worry.

I like my left foot, almost as much as the right. The brush was whatever my hands first came upon, it's actually an oil painting brush. The watch is 24 years old now and is a Casio Tough Solar Waveceptor, never let me down, never been opened, still waterproof and has been all over the world with me. Best £40 I ever spent.. The fact I never have to set it, because it uses the atomic clock for date, time and location is a huge bonus, because I can't remember how and it has a 53 page user manual. I do have a few other watches, but this is my go to and on my wrist as I am typing this.

I have no idea why that would be, unless you're using really oily beans. If not, try reaching out to Niche.

tinyurl.com/y8gdetym

I guess once you become aware of the effects and cost of wasted coffee, it's easy to understand why it's important. Even other manufacturers have started worrying about retention. Before we simply got scaled down versions of the commercial offerings, which were generally unsuitable for the prosumer user at home.

You need to read my review of the grinder. I was able to test retention and exchange and come up with accurate figures.