Gotta remember that even though these chemicals are as safe as they can be for reptiles, they are still meant to KILL other living things (pests), and so they do have dangerous things in them. In my opinion, always play it safe. If it says to air out the enclosure for 24 hours, I'd do it for 48.
Remember, inhaling aerosols is a no go! (flashback to being a high school idiot)