The filter was easy to install. just a lot of effort for a cup of coffee. The filter also allows coffee grounds to pass through. I know it's installed correctly as it makes coffee and doesn't leak. I bought a box of Keurig My K-Cup filters, thinking they would provide bottom passage. Another waste of money as they are too small. I searched the internet and didn't find any paper filters just for this reusable filter. I emailed Kerig and asked for a paper filter that would work. or back. Of course nobody bothered to contact me. I bought this filter based on the reviews. My only conclusion is that these people either don't mind having soil at the bottom of their cups. Or sprinkle them with ground coffee. Should I ever get an answer from Kerig. and they can give an acceptable answer. I will update this review.
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