Um, is the filter that's getting clogged something he could just take care
of himself, say, weekly?
As for pre-rinsing the manual says nothing about that except if you don't
plan to wash for a long time you should run a rinse cycle on the machine.
All it says is:
"Remove leftover food, bones, toothpicks and other
hard items from the dishes. Remove labels from containers before
This is from this manual. Not the most expensive Maytag.