I have been unsatisfied with the performance of the dishwasher that came with my house, a Kitchenaid / Hobart Superba 21 from the 80s. It would put stuff like coffee grounds over the top rack dishes, wouldn't rinse out the top rack, and similar stuff. I've taken it apart a few times, and recently discovered that I was missing a filter screen. It was so completely destroyed that no trace remained of it.
I 3D printed a replacement for this after reverse engineering it. The screen that came with it looks to be a 80-100 mesh nylon, but it is hard to tell. For now, (until I print a new one) I have a ~60 mesh which is far too coarse, and larger food particles make it into the top rack. I used a soldering iron (With a fresh non-leaded tip!) to push the mesh into the print.
Photos and files below. I'd print it in a tougher filament like ABS or PC. PETG may be too soft as this part gets pretty hot.
