1. Get a large bowl or pot, then combine the rice sticks in it.
2. Use lukewarm water to cover up the sticks – the water should feel warm to the touch but not hot. Leave the rice sticks to soak for about 7 to 10 minutes or until they separate.
3. For the next step, prepare the rice sticks. Since the rice sticks are only partially cooked, you will need to either use them right away or store them in a method that keeps them from sticking together or drying out.
4. You can now drain the rice sticks and set them aside. The simplest method is to strain them through a colander.
5. To stop the cooking process, rinse the rice sticks under cold water. Then drain the water once more.
6. If you are not ready to add the rice sticks to the dish yet, you will have to avoid the noodles from drying up or clumping together briefly.
7. Mix them with a small quantity of sesame oil. To reduce the drying process, even more, keep it in a sealed container at room temperature.
8. Proceed to prepare and cook the stir-fry or soup.
9. When the stir-fry or soup is nearing the end of its cooking time, you can proceed to toss in the rice sticks.
10. Serve and enjoy.

You can watch this video recipe to know how to cook rice sticks.