[quote name='Temporaryscars']Do bug bombs work on spiders? My garage is out of control.[/QUOTE]
You could always ask shrike... just insult his wife three times and he'll appear...
Seriously, I don't know.. maybe, since I'd assume one insecticide is pretty lethal to MOST insects... but you'd probably have to go look at a box and see what bugs it claims to work on in general. If you can manage to coexist with the spiders and they stay in your garage, leaving them be is not a bad idea either, because they tend to eat all the other bugs that you'd normally want to bug bomb.