Alan K Derby , KS August 10, 2015 Appliance: Model MDBH898AWB2 Top rack not cleaning Changed manifold first, did not fix. Tried the top rack sprayer arm seal still had problem. Disassembled to check cutter, found cutter in pieces replaced fixed problem. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes