Hi, can you re post with the model number.This is usually on the side of the silver inner door or handbook.Diplomat is only MFI trade name and they were made by different companies.You may need to replace the salt cap and clean all the holes in the spray arms.These come off by twisted the arm collars anti clock 1/4 turn and pulling down.Use 3 in 1 tablets after cleaning the spray arms and see if it improves. All the best.
FOXY
September 2008