I have a BD Accuri C6 in my lab for four years, and met different kinds of problems, such as the valve problem a lots of people have been talking. The student and I have been trying to replace the valves, but usually it works for a few months and get bad again and again. Today, a new problem shows up -- running a 19-ul sample and only recorded 6 events, the volume recording showing weirdly, up and down, sometimes is minus??? This is the first time I met this symptom, valve blocked again?

Due to budget limitation, I'm thinking to upgrade to C6 plus. But I'm so afraid that the PLUS will have the same problem. Anyone is using Accuri C6 plus? please share your experience.