@dasein I'd start looking for common obstruction in the water flow. This seems to be an issue with the Keurig Single Serve Coffeemaker Brewing System. After a while it appears as if scale build-up or other contaminants prevent the Keurig from brewing full 12oz. It takes longer to brew, the Keurig becomes louder and it dispense on the average 4oz or less. This is a "quick and dirty" guide