Im very anal about scent and your vehicle is probably the toughest to keep scent free with people riding in your car and what not. So what I do is I have a set of seat covers that I put on before I go hunting and remove them when I am done. I wash my seat covers in Scent free soap. That is about all you can do, also remove all of your scent things you hang up prior to hunting season. Mine that I use are usually natural smells but I remove them anyway. Also change into your hunting cloths away from your vehicle when you get to the spot your hunting. Hope this helps ya out