Propeller Repair My New LG Dishwasher Is Dirty Propeller Noise And I Can't Figure It Out.?

My new LG dishwasher is dirty propeller noise and I can't figure it out.? - propeller repair

I have an old dishwasher from LG years from stainless steel and is usually very quiet. Recently, I had to create the repair man and tried to restart the sound, but of course did not happen. Sometimes he spits and is usually a snarl. Does not seem fair. The man said to 2 cups of white vinegar in my next load, because there was plenty of leftovers. Are you responsible for the removal of grinding things and how to solve this problem? I Should someone?