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Topic: Advice on cleaning MACAP M4 grinder (3 msgs / 79 lines)
1) From: Angelica M
Hello all,
I have had my MACAP M4 one year and I use Grindz about every 2 months (as
manufacturer recommended b/c I only make one double shot a day). Suddenly I
have a pretty strong stale coffee smell. It is the worst in the doser area.
I also vacuum and use a cloth for remaining debris/oils.  I just used Grindz
last night but to no avail. The burr area got slightly better but not the
doser. Strange thing is last night I washed the lid only of the doser with
soap and water and even that piece is still retaining stale coffee smell.
I use Grindz because I want to avoid taking the machine apart until the
burrs need replacing, which should be many years from now. I am not at all
mechanically inclined so I would like any advice on anything else people
think I should be doing to keep that smell out--especially if I don't have
to take the machine apart. And why would even the lid not wash clean--that
seems weird.
THANKS IN ADVANCE.
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2) From: Allon Stern
On Jan 15, 2010, at 2:34 PM, Angelica M wrote:
<Snip>
Sounds like you need something that will dissolve coffee oils. Rice or Grindz may not get it all.
You mentioned a doser? I'd recommend tearing down the machine, brushing out any grinds that may have gotten into hiding places, and then washing any washable parts with hot soapy water, OR if you're feeling adventurous, and don't mind risking washable parts, you might try something stronger - we have a product at work that does an impressive job removing coffee oils that regular soap and water won't touch; Tom carries Urnex TABZ which might do the trick.
It's tricky with a grinder knowing what you can safely wash, though. For coffee brewing equipment, typically these products aren't a problem (except on aluminum parts!) but for grinding equipment, you may need to be a little creative. You especially want to avoid causing any rust, or using any products which will harden rubber or make plastic brittle, etc., etc., etc. Good luck!
-
allon
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3) From: Mike Koenig
If you are vacuuming and wiping the doser clean,  the stale stuff might be
hiding out in the chute, and under the burrs - you would smell that in the
doser.
About once a month or so, I take the top burrs out and clean out the
inside.  It's not too hard, but you need an allen wrench (metric, but I
forget the size..) to take off the adjusting screw in the back. (assuming
you have the stepless model).  Once that is off, you can unscrew the top
burr carrier, and brush everything out.  When putting the burr carrier back
in, make sure there are no stray grinds in the threads, and make sure you
don;t screw it down past your zero point when putting it back in.
You might also have some gunk under the spokes of the doser - try wiping
with a rag as you move the spokes around to get under there.  Some of the
"dust off" canned compessed gas can be useful for dislodging some of the
gunk down there as well (I use an air compressor),  but be careful as this
will shower powder all over your kitchen. (I've learned the hard way to do
this outside)
As far as the smell not washing out,  soap and water isn't the best a
removing coffee oils,  something like Cafiza is usuallly needed, but this
isn't something you want to soak your doser in.
I don't seem to have too much of a stale smell in my doser, I get it more up
in the burrs.  I also don't roast very dark (typically just into 2nd crack
is as far as I go) so I don't have too much of an issue with oils on the
surface of my beans.
--mike
On Fri, Jan 15, 2010 at 2:34 PM, Angelica M  wrote:
<Snip>
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