Dude I had to descale my keurig again! Man either the water in my area is full of crap or damn I don’t know.
It seems like once a month I’m pouring vinegar through and cleaning off a white scum material. Gross.
Pour vinegar in the reservoir, let it sit, rub scum off filter and sides, rinse out.
If necessary run the vinegar through the machine… However, don’t use that water for coffee until vinegar is totally gone…. Coffee and vinegar don’t mix well at all! Yuck!