What are the steps to properly bleed a bicycle hydraulic brake line?

To properly bleed a bicycle hydraulic brake line, follow these steps:

1. Gather the necessary tools and materials, including a bleed kit, brake fluid, and a syringe.
2. Remove the wheel and pads to access the brake caliper.
3. Attach the bleed kit to the brake caliper and open the bleed port.
4. Fill the syringe with brake fluid and slowly push the fluid through the system to remove air bubbles.
5. Repeat the process until all air bubbles are removed and the brake lever feels firm.
6. Close the bleed port and reinstall the wheel and pads.
7. Test the brakes to ensure they are functioning properly.