I used iso and salt for years. It works great!
But Grunge Off is better. Biodegradable, all natural, reusable, soak. Not zip locks and shaking your pieces around to get the salt to scrub. Just soak over night when you go to bed, and rinse with hot water in the morning. No scrubbing needed.
Even quick 10min soaks get the majority of it. The rest can be whipped away with a qtip