Hi M.,
Rachel's advice sounds excellent.
I figured that since dishwashers washed dishes, they'd wash themselves too. It's a good thing you rinse your dishes before you put them in the dishwasher. I hadn't and discovered that a lot gets stuck out of sight to the side of the wall below the dishwaher door. YUCK! I discovered a product that is to be used to disinfect the dishwasher. It doesn't get rid of all of the sticky mess, so I've had to pull the rack out and scrape away at that disgusting mess. Use gloves if you need to do it! It's a sticky mess of food and dishwasher detergent. Here's a link so you can see the product:
http://www.summitbrands.com/brands/Dishwashermagic.aspx
Some of my white plastic containers were covered with little black dots that were nearly impossible to remove. I figured it's probably bits of black plastic from the other items such as handles, etc. also in the dishwasher. I now wash them separately.
Good luck,
: ) Maureen