By purchasing an electric ultrasonic cleaner. Preferably from a B accredited, eco friendly website and business. With these cleaners you never have to throw out plastic again. Plastic silverware, utensils, even plastic bags, can all be cleaned with the electric ultrasonic cleaner.
I have not purchased mine yet, so I don't know if it will actually clean them that well. But due to the emergency nature of climate change, I couldn't wait any longer to post this. If it works for you, be sure to list the brand and model number of your device, so that people can review and compare the optimization.
Also, post any other suggestions that people can do to reduce global warming and climate changes.