Spiders in cars are very tough to take care of. Here's something to think about, professionals will not fog cars due to possible liability issues. Be very aware of how you're feeling in that car for the next month or two. If you start getting a headache, roll the windows down or better yet, get out of the car for a little bit to get some air. Secondarily, spiders don't take bait - only live food, and they don't groom themselves so you can't lay down a perimeter of poison that they'd walk through and and die. The only way to get them is with direct contact with spray poison. Do your best to make the car uninhabitable. Spiders need a source of water to live, they can only go about 3 days without water. That makes it likely that there's a leak somewhere in the car. Give the car an extremely good cleaning, look in and under all the nooks and crannies for spiders and keep an eye out for any damp carpet that could be a leak. Wear pants and pull your socks over the bottoms of the pant legs until you've gotten rid of them. The only good news is that these spiders have a relatively mild bite that doesn't need medical attention. Well, that, and you've got an awfully good natural pest control device living in your car - too bad they're not so pleasant to live with.