Bug-bombed the garage

I set off a Hot Shot No-Mess Fogger (with odor neutralizer) in the garage yesterday. Our house isn't too bad, but we seem to have a lot of gnats and spiders in the garage. I figured it was worth a try. I thought about doing two foggers at the same time, but there was a warning against that. So I tried one of the three that came in the pack. I figure if it didn't work, I can still use the other two at the same time. The garage is a slightly larger area than what one fogger should cover. I just set it off in the middle of the room when I left for work. It was shut up all day, then we opened both doors when we got home last night to air it out. We'll see.