NOTE: Any buildup on the sprayhead and fitting may restrict water flow, and impact your coffee brewing. For consistently great coffee, clean sprayheads and fittings weekly with sprayhead cleaning tool (#38227.0000). Upon visual inspection it may appear that light passes through all holes in the sprayhead plate, but a thin film of residue can pass light and still impede water flow
See installation and operating manual for calibration routine to verify sprayhead flow rate matches programmed flow rate. Machine may need to be recalibrated due to lime build up or the use of alternate designed sprayheads. If machine is cleaned and build up removed, machine must be re-calibrated to achieve desired volumes.
Source: MaintainX (Community Member)