I decided to try and figure out why my dishwasher wasn't working as well as it should. So I watched some online videos and decided it was time to take matters in my own hands.
I took mine apart and found all sorts of crap in there. There was about 5 pieces of plastic. Some pieces of ceramic from a mug that broke in the dishwasher, a whole lot of what looked like a paper towel, and, of course, food bits, grease and other nasties. A lot of that stuff was clogging up all the drain holes in the dishwasher. I put it back together and am running a cycle now with a cup of vinegar to give it a good internal cleaning.
I think I am going to add this to my calendar to do once a year. Took about a half hour to do the whole process start to finish, and a lot of that was all the crap that was in there.
WARNING: If you've ever had glass break in your dish washer, there may be sharp pieces of glass down there. Proceed with caution, lest you slice your hand open.