Get a big one.
Get one with a heater.
Get one with a timer.
Get a bit of wood and some spring clamps and put your parts in ziplock bags with whatever solution you choose.
Fill the cleaner with water and hang the bags in the water by clamping them to the stick, which should bridge the two sides on the cleaner.
DON'T allow the bags to touch the sides or bottom - if a part inside the bag touches the side/bottom the vibrations may wear a hole in your ziplock.