Our dishwasher wasn't working well again and needed a couple of filters cleaned out. I learned a couple of things, though.
1. Don't try to fix something like a dishwasher that has many parts that have to be reassembled while watching a couple of young children, even if you have older kids helping. There are many distractions, like kids escaping outside, using a computer as a writing pad, or one child mistaking a little brother's mouth for a tennis ball. Wait until things are calm and you can work in one stretch so you remember where all the little parts belong. Of course, that still doesn't assure you'll remember where all the little parts belong, but it helps.
2. Saving time by holding the other screws in your hand while screwing in another is not really a time saver. It is too easy to drop the extra screws down holes you never knew existed. Although this time dropping two screws did help me to find another filter that was clogged, so I guess it wasn't all that bad.