Where is the evaporator drain tube on a 2008 Kia Optima?

The evaporator drain tube on a 2008 Kia Optima is located under the vehicle, typically near the firewall on the passenger side. It extends from the evaporator case and allows condensation to drain outside the vehicle. To access it, you may need to lift the car or look under the dashboard to ensure proper drainage and check for any clogs.