How do you fix a vent on a toilet in a condo so it vents correctly?

To fix a vent on a toilet in a condo, first, ensure that the vent pipe is clear of obstructions, such as debris or blockages. Check for proper slope and connections in the vent system, ensuring it leads to the roof or a vent stack. If necessary, replace any damaged sections of the pipe and ensure all joints are sealed tightly. Lastly, test the system by flushing the toilet and observing for any gurgling or slow drainage, indicating that the venting is functioning correctly.