Tony H Cypress , TX January 29, 2018 Appliance: Bosch Dishwasher SHP65T55UC/07 Bosch Dishwasher Shp65t55uc/07: Dishwasher not cleaning like it used to. How to replace Dishwasher Lower Spray Arm. Our Bosch dishwasher was not getting the dishes as clean as it once did. Plates were coming out very grimy and there was a lot of grit in the glasses. I ordered new spray arms for both the top and bottom racks. This seemed to solve the problem as the glasses and plates are clean again! 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes