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I have been using these tablets in my C6 and have been noticing the flow has been a bit restricted. The taste is a bit off as well. The machine just prompted a few days ago to start a clean cycle, I did, and now just a few days after cleaning it is clogged more than ever. I only use good dry beans (Illys or Lavazza), so that's not it. Upon further inspection this product packaging looks different than OEM Jura packaging (Jura uses a dark box - no white) and this product has a statement on the box stating "laboratory tested original Jura product". That should have been my first clue. Warning folks - Don't buy this and risk your machine. You paid a lot for the machine, so use the right products. I am cringing at the thought that I may have permanently damaged my machine - according to the User Manuel. Get your cleaners from a reputable coffee product provider. It will cost you a bit more, but consider the cost of replacing your machine and it is a bargain. I looked around and checked ratings and found: Seattle Coffee Gear sells this 6 pack for $19.50 (offers auto ship subscriptions too). Whole Latte Love sells them for $21.00. Both only sell OEM products and have great resources on their sites. I love Amazon, but clearly I need to be more cautious with critical products used on expensive machines.
This company is very greedy. The jura coffee machines are very expensive. Jura must not think they're making enough profit so they rip you off with their cleaning products. 6 cleaning tabs for $18 (it's the best price I found) is too much. For the same price you can buy 100 tabs of Urnex Cafiza Espresso Machine Cleaning Tablets for the same price.