Yesterday we gave you the first half of our list of things to NEVER put in the dishwasher. (Didn't listen yet? Go now!) Ok, ready for part 2? Here they are: 5. Pet Feeders Fishing your hand into the bowl and scrubbing off old cat food may seem like enough of a hassle to make you tempt fate and just toss it in the dishwasher, but as one Flickr user learned, the time saved isn't worth it. 6.