Dishwasher not getting dishes clean

My 2001 kenmore elite dishwasher isn’t getting the dishes clean and the soap isn’t all dissolving, even though I fill the resevoir half way. Dishes are mostly rinsed too before they are washed. Any help would be greatly appreciated. Thanks

Check the water level in the dishwasher.

Check if the wash pump is running during the wash cycle.

The model number you posted is incomplete. There are suppose to be three or four more digits.

Gene.