I've stumbled across a neat item for submerging small parts (nuts, bolts, etc.) in cleaning solvents.
Healthy Choice CafÉ Steamers (microwave dinners) have a two part plastic dish.
The top dish (veggies, rice, noodles etc.) is six inches in diameter and an inch'n half deep with a perforated bottom and fits into the larger serving bowl that's 2 inches deep and contains the sauce.
After devouring the Chicken Margherita with rice and unidentifiable bits of green and red veggies you can drop cruddy nuts and bolts and stuff in the perforated dish and drop it into the bowl filled with caustic cleaning juice.