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What's under the screen?
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erik_hammarlund
Senior Member


Joined: 20 Jul 2004
Posts: 175
Location: Martha's Vineyard, MA
Expertise: I love coffee

Espresso: X5
Grinder: Nuova MCI doserless
Drip: Braun / bodum press
Posted Sun Feb 23, 2014, 12:29pm
Subject: What's under the screen?
 

I am cleaning out my old (new to me) Astorka CK.  Just got the screen off, and there's a solid layer of... brown/black goop.  Yuck.

What's under that?  How fragile is it?  Can I go at the mess with (choose one)
flat head screwdriver
wire bristle brush
hard plastic scraper
wood scraper
soft (plastic) bristle brush...

Help!
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emradguy
Senior Member
emradguy
Joined: 31 Mar 2011
Posts: 3,227
Location: Houston
Expertise: I live coffee

Espresso: Duetto II; Twist v2
Grinder: M Major, Macap M4, Pharos,...
Drip: Espro presses; Aeropress
Roaster: H-B "List of Favorites"
Posted Sun Feb 23, 2014, 1:20pm
Subject: Re: What's under the screen?
 

some of what's under there might be brass, so I'd avoid using steel on it.  Use a hard plastic bristle brush.  If you have some Cafitza or similar, dissolve some in a bowl, and dip the brush in it as needed. Routine maintenance, such as water backflushing after every session, and removal of the screen every few days to a week, will help you prevent this from happening to you.  People argue about how often to detergent back flush, but every 50 shots is the recommendation on 1st-line.com (though that may be E61 specific - I can't recall).

 
.
Always remember the most important thing is what ends up in your cup!
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erik_hammarlund
Senior Member


Joined: 20 Jul 2004
Posts: 175
Location: Martha's Vineyard, MA
Expertise: I love coffee

Espresso: X5
Grinder: Nuova MCI doserless
Drip: Braun / bodum press
Posted Sun Feb 23, 2014, 1:53pm
Subject: Re: What's under the screen?
 

I but the bullet and took off the whole portafilter holder things, so I'm soaking it in cafiza now.  You're right--it was brass, though you couldn't tell (even after it was off i had to go at it with a plastic spoon for a while to even make a scratch.  Yuck.)
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