The consensus is the Raid fumigator leaves a fresh clean smell without any oily residue. I haven't tried it myself, I still have the box on my desk. Enough people have recommended it that I'd have no problems giving it a go. It was designed for kitchens and stuff, just make sure you cover up your utensils, fish tank, food, etc...
I don't have a spider problem in my Condo, its in the car.. lol
No Fish Tank in my car