Open the lid. The noodle stripes should have taken a slightly reddish-brown color, and are somewhat sticky at the outside. Take a small cutting board (or something similar) to fan fresh air into the pot – the noodles turn dry at the surface, lose their stickiness, and change their color some more. Use a fork or some chopsticks to separate the noodles from each other. They should not stick to each other anymore (sticky noodles means that either there wasn’t enough oil in between, or they haven’t finished cooking yet).