How can I repel yellow sac spiders from my car?

I've had a bit of an issue with yellow sac spiders at my house for years. I know how to control them in the house and how to get rid of them, but I still have problems with them getting in my car. I've read things that said yellow sac spiders like the smell of gasoline. I know that they are coming from out... show more I've had a bit of an issue with yellow sac spiders at my house for years. I know how to control them in the house and how to get rid of them, but I still have problems with them getting in my car. I've read things that said yellow sac spiders like the smell of gasoline. I know that they are coming from out of the tree that I park my car under. The tree coming down is not an option, and I do not have an alternative parking space. I was recently bitten and it's very painful (worse than a hornet sting) and since they're present in such great numbers it is a problem. If anyone knows any remedies to repel the spiders from my car I'd greatly appreciate it.
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