I am using the Mouse port assembly (ID 1009). I have encountered a persistent issue regarding valve calibration. The valves do not deliver the same amount of water from day to day. Even when testing the calibration curves consecutively, the amount delivered is not the same. This results in a need to calibrate them very regularly (once a week, and if a valve is not delivering the proper amount several times a week). To tackle this issue I have tried to change the tubes regularly as well as passing large amounts of water through to avoid debris clogging the system. Nonetheless, the inaccuracy of the delivered amount persists.
Any potential solutions for this problem?