Well there's some 'evidence' that would indicate that rinse aid at least probably isn't the sort of thing you want on your coffee gear. Considering most people use dishwasher tabs these days that have the rinse aid built into them leaving it out or controlling the amount you use isn't an option. Now we just need 'Beansontoast' to present evidence that refutes Mr Jack's evidence and we'll all be able to chuck everything in the dishwasher. Shouldn't be hard as it sounds like 'Beansontoast' might be a chemist.
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This experience can not be compared with the daily cleaning of well maintained equipment/cups, etc...Originally posted by Beansontoast View PostI once acquired an old portafilter that had a buildup of coffee grime. After hand washing failed to shift it, my next move was to try soak it in boiling water for half an hour. That removed a bit more, but there was still a lot that didn't come off. My conclusion was that hot water (and hand wash detergent) is not enough to remove coffee buildup.
The instance you describe is the result of long oxidised coffee oils that have been transformed into a kind of varnish and not that dissimilar to oil based varnishes used to preserve wooden articles. Naturally, you can not remove it with just hot water with or without some kind of detergent...
Mal.
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All the metal bits. But these days we usually handwash so our dishwasher only gets run about once a month. I don't notice any change in extraction following a machine wash.Originally posted by LeroyC View PostDo you wash all your coffee equipment in the dishwasher? Whatever that may be - portafilters, filter baskets, French press etc?
Fair enough, although I would still argue that when using the correct amount of rinse aid, and placing things so they drain properly, it is not an issue. Is anyone using their recommended alternative of multiple deionised water rinses?Originally posted by MrJack View Post
Anyway, that article doesn't recommend against machine washing, just against rinse aid which as I have already stated is optional.
Once again, fair enough. I don't have that problem but if I did I would certainly think twice before using the dishwasher.Originally posted by MrJack View PostI always rinse my glassware before use when washed in the dishwasher, to get rid of the residue (which smells and tastes unpleasant).
Plenty of tablets or powder available that don't contain rinse aid.Originally posted by LeroyC View PostConsidering most people use dishwasher tabs these days that have the rinse aid built into them leaving it out or controlling the amount you use isn't an option.
Not sure where you get that idea from? This is high-school level stuff. I would welcome proper testing from someone who knows what they are doing.Originally posted by LeroyC View PostShouldn't be hard as it sounds like 'Beansontoast' might be a chemist.
I chimed in when I saw what looked to be several people repeating a mantra without any evidence or even reasoning. So far MrJack is the only one to offer any evidence or reasoning. I am happy to be shown wrong if it based on actual evidence.
Maybe, but my experience washing oily things in just water is that it leaves a film of oil behind. A hydrophobic film in fact. Now where did I just hear that a hydrophobic film on coffee gear was bad?Originally posted by Dimal View PostThis experience can not be compared with the daily cleaning of well maintained equipment/cups, etc...
The instance you describe is the result of long oxidised coffee oils that have been transformed into a kind of varnish and not that dissimilar to oil based varnishes used to preserve wooden articles. Naturally, you can not remove it with just hot water with or without some kind of detergent...
Mal.
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Well, you seem to be the self appointed expert on all things to do with this topic, so will leave all the wisdom to you.
There's probably upwards of a century of knowledge and experienced gained from the various respondents above, but what would we know...
Mal.
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