paul in AZ
Any clogging of spray nozzles or other parts of the system could be because of prior use of new generation powder detergents. The old stuff contained phosphates and worked well. They quietly introduced phosphate-free powder detergents a year or so ago. The new versions have no phosphates and leave a hard white powder-like film on interiors, dishes, silver, the pump and nozzles. It buggered my Bosch to the point that the cost of replacement parts was high enough that I got a new machine.

The pellets work great even in the mineral loaded water we have here.