Bug Bomb.
If you’d like to avoid poison sprays, sprinkling diatomaceous earth across ingress points will deter them from coming in (as well as the coffee grounds and tea leaves discouraging them). Killing the ants you see won’t solve the problem, though, as noted above. If you put out the baits, that will eliminate the colony they came from.
"Remember there could always be giant ants, like in Santa Clara in 1950!~~~~~Ray Stantz
Perhaps a bug bomb/fogger? The exterminator companies can still get ones that are effective.
The ones we can buy are almost useless. They don’t have strong pesticides anymore.
The advantage is the fogger can reach every nook and cranny in the car. Including up under the dash and behind the door panels & headliner. Nasty buggers are probably under the carpet too.
A friendly motorcycle cop? In Texas? Are you sure you weren’t just having a dream? 
I’m not sure how safe it would be to use a fogger in a car. You’d end up with pesticides throughout the ventilation system. It seems like it would all be blowing on you when you’re driving with the fan on.
No kidding. I was surprised, too. Especially when he made the remark about God using him. I’m soooo glad he didn’t give me a speeding ticket. That would only have been the third speeding ticket I’ve gotten in my whole life. The last one was about 15 years ago, and I did the online driving class to avoid the hit to my insurance. The ticket was about $75 if I recall correctly.
I went out a little while ago to check on the ant baits. I didn’t see any ants in the car, but I saw LOTS of them scurrying around on the ground. I took a few of the baits out of the car (they had melted in the closed car and the sticky stuff inside was oozing out – it was over 90 here today) and put them in the middle of the ant chaos and panic scene on the ground.
I’m reluctant to do a fogger in the car or to let an exterminator do one. I can leave the ant baits in the car for a long time (the non-sticky ones). Meanwhile, tomorrow I’m going to get some spray and dose the tires. (Such a smart idea!)
That’s the answer, right there. Just don’t lick the steering wheel for a few days☺️
(Foggers are safe enough, people use them in houses by the gazillions. Maybe if you have COPD, not a good idea)
If you can buy boric acid powder, that makes an excellent ant (and other bug) killer. Most hardware stores carry it, and I’ve seen it in big-box grocery stores, too, in whatever aisle they put mouse traps & fly paper.
You can mix it with a bit of jam & stuff the mixture into the ends of couple-inch pieces of drinking straws, to make homemade ant baits. Little suckers can be taped wherever you like. The jam attracts them, and they trot the poison right back to their colony … and the queen.
RE: Coffee grounds…if this doesn’t drive them away, maybe it will keep them up at night. Is that good or bad?
I went out to my car this morning and I do not see any ants inside. In the hot sun a couple of the ant traps overflowed their sticky syrup onto the door of the car and a little bit on the dashboard. So now I have a different problem namely how to clean up that syrup.
Yesterday I threw some of those ant traps on the ground next to the car amongst some black ants, and this morning they were swarming all around and one of the ant traps was filled with their tiny dead bodies. Sorry, I don’t want all the ants in the world to die, I just don’t want them in my car.
One of my neighbors who used to own a plant nursery had ant spray and he came out and sprayed my tires. Then I moved my car. I’m going to leave the non syrupy and traps in the car just in case.
But back to my new problem: any ideas how to clean this sticky syrup off the door-- it’s not on fabric just on the hard plastic. And there’s not a lot of it, just a little trail. It has hardened due to the fact that this was done yesterday also the hot sun in the car yesterday afternoon. Heloise, where are you when I need you?
I’m dictating this to my phone, so the language may not be as precise as I like it to be. I’m in the dining room at The Home and this morning’s breakfast was pancakes! Speaking of syrup, right?
But wait, there’s more. I got in the car to drive it and a warning light came on on the dashboard that has to do with the battery. I have a fancy schmancy battery system that’s called i-eloop. The light came on that said that needed to be checked. I had it checked in February, a couple of months ago. I happened to be near the dealer so I drove in and talked to the same guy who helped me yesterday. And he said maybe the ants did some damage to the battery. I truly don’t see how these tiny ants over a period of only a week could have done that much, but then who knows? It never rains but it pours.
Sounds to me like someone is reeeeeaching for an external cause to blame to avoid warranty work, but if the cost to you would be the same ants or no ants, that wouldn’t be it.
Ants can damage electronics but something as large and crude* as a sealed battery? 
*“crude” in comparison to a small box with high-density electronics, like an engine control computer.
Near the gulf coast we get Rasberry crazy ants. “Crazy” because they can’t seem to walk a straight line. They’re somehow attracted to electronics, and will pack themselves in backyard electrical boxes. If the neighborhood’s internet service suddenly drops, it’s likely because a million ants just got electrocuted. Regular ant baits and pesticides are not effective.
Not sure what kind of damage they’d do to car electronics.
Are you in their range?
Hmmm…actually, yes I am. One of the westernmost Texas counties on that map.
I’ve known ants to get into window air conditioners and fry the unit as well as themselves.