Use these,..
https://www.amazon.com/Reusable-Bre...s&keywords=k-cup+reusable+coffee+filter&psc=1
Buy your own coffee to use.If your not cleaning them weekly and making sure the filter is in good shape anything will fail over time.Ignorance about how to maintain one is sad considering how much info is available on the net.I use a cup of vinegar run thru mine weekly,coffee's always great tasting too bad you coffee novices are still stuck in the 60's,lol
way too much effort......