My dishwasher says to do those things in the user manual. It even has a little indented dish for prewash powder on top of the main soap door. It also says to re

My dishwasher says to do those things in the user manual. It even has a little indented dish for prewash powder on top of the main soap door. It also says to regularly clean the filter which makes a big difference preventing any of those “specs” from ending up in the bottom of cups.