How to get moths out of your car?
Try using moth balls inside your vehicle. I use them to keep insects away from woollen clothes. One drawback is that your car will smell, for a time of moth balls, which can be somewhat annoying. But the alternative may be more annoying.
If you wish to employ other scents, you could possibly use cedar shavings. I have never employed them, but some people use them.
Employing a black light may also help in locating the the little pest for disposal or removal. It is an option and you may hay to be inventive on this.
Blacklight sampling can be done one of two ways. The black light can be suspended in front of a white sheet, giving flying insects a surface on which to land. You can then observe the insects on the sheet, and collect any interesting specimens by hand. A black light trap is constructed by suspending a black light over a bucket or other container, usually with a funnel inside. Insects fly to the light, fall down through the funnel into the bucket, and are then trapped inside the container. Blacklight traps sometimes contain a killing agent, but can also be used without one to collect live specimens.
When using a black light to collect insects, you should set up your light and sheet or trap just before dusk. Make sure the light faces the area from which you want to attract insects. In other words, if you want to draw insects from a wooded area, position your light between the trees and the sheet. You'll get the greatest diversity of insects if you set up a black light at the intersection of two habitats, such as at the edge of a meadow adjacent to a forest.
Use forceps or an insect aspirator (sometimes called a "pooter") to collect insects from the sheet or trap. - Using a Black Light to Collect Insects at Night
A piece of white cardboard on leaned against the window may work.
You can get black flashlight in some hardware stores light Canadian Tire, here in Canada, where I got mine.