Everything I've read says that pre-rinsing dishes before putting them
in the dishwasher is a major waste of water (and energy if you use hot
water). Obviously scrape the large stuff off first-- you don't want
to put corn cobs into the dishwasher, or a half-eaten steak.

I'll bet that if you check the website of your dishwasher company, or
call and ask, they'll tell you rinsing is not necessary.

Not necessary for dishes. For marital happiness that's a different
story.