Posted Sat Nov 13, 2010, 7:06pm Subject: cleaning starbucks barista machine
I am cleaning my niece's starbucks barista espresso machine today. I ran the descaler and then let the portafilter sit in the solution for most of the day. When I ran water thru the portafilter a lot of black/brown "stuff" came out and continued to come out thru a full tank of water. I am now resoaking the portafilter in lemon juice. Is this coffee residue or mold that is coming out when I run the water thru the filter. Yes, I did run 2 tanks of clean water thru the steam wand and espresso area prior to putting the portafilter back on after it's all day soaking I hope this isn't mold, but wondered if anyone out there has seen the same thing.
Posted Sun Nov 14, 2010, 12:18am Subject: Re: cleaning starbucks barista machine
The pressurized portafilter for this machine has many internal plastic parts that hold onto old coffee residue. If you are mechanically inclined you can take it apart and scrub it with a toothbrush. That's what I ended up doing with mine. Amazing the disgusting gunk that was lodged in there.
Posted Sun Nov 14, 2010, 7:20am Subject: Re: cleaning starbucks barista machine
Descaler is for removing limescale (mineral deposits) from inside the boiler - it is acidic. There would never be any coffee residue inside the boiler - only the minerals left behind after the water is boiled out. So descaler really isn't designed for removing coffee residue.
Detergent is for removing coffee oils and coffee residue. It is for the parts outside the boiler that come in contact with the coffee.
I doubt you would have any limescale in your portafilter - so soaking it in descaler (acid) isn't something I would do - especially your pressurized PF with plastic parts. Soaking it in detergent is good though.
The suggestion to take it apart and clean it is a good one - but use detergent, not descaler, to clean it.
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