2021 Prius startup AC mildew odor

The recovered conversation points to cleaning the evaporator through the condensate drain rather than spraying product into the dash vents. It identifies Lubegard Kool-It Evaporator & Heater Foam Cleaner #96030 as the product discussed, places the drain connection on the passenger-side HVAC area behind or below the glove box, and gives an inside-footwell access path. The procedure remains a practical starting point, not proof that the odor has a single cause or that the treatment will solve every vehicle.