1. Lemon Juice. Basic, environmentally friendly, and strong. I use this to help pull some of the smell out, and take some of the tar off of the plastic.
2. Baking Soda. As with lemon juice above, basic and environmentally friendly. I use this sparingly as to not scratch off the paint or patina.
3. Oxy Clean Pre Fabric Cleaner Spray. Ok, so this stuff is amazing. I used to use the Oxy clean laundry powder back in the day to refurbish the outer shells to Nintendo Entertainment Systems. I am not sure if Oxy Clean is environmentally savvy, but watching the Oxy Clean pull Tar off of my new/used toy was amazing.
4. Basic Dish Soap. I use this to help with smell and to keep the Oxy Clean frothy.