So my CT got broken into recently and the glass exploded all over the car. Some glass went down the battery cooling vent in the passenger rear seat. The glass on the fan whirring noise was excruciating. My window repair guy was able to get a narrow vacuum hose down the vent and sucked up all the glass. I was so happy to avoid the drag job of having to remove the seats and most of the rear trunk to access the fan. I just found a really good Prius video on YouTube explaining the process that can cost upwards of $500 at a dealership. Anyway just passing on my experience.