With our dishwasher, if it's not packed properly and the spray arms can't
spin properly, then the bits of food on the plates etc don't get rinsed off.

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This is my first time with an apartment that has a dishwasher.
Often when I wash a load of dishes, bits of particles get deposited and
dried on the top portion of the dishes, especially stainless steel.
Does anyone know the cause of this?