Help with internet?

[solo]

Um, you shouldn't spray electronics with anything, generally.

Anyway, it sounds like you somehow turned your laptop's wireless card off. First, look on your laptop's side or front or something and see if there isn't a button or a switch that you might have accidentally flipped to turn the wireless off. If there isn't one, if you're on a Mac go to the top where you'll see four wireless bars, click on it and Turn Airport on. If you're on Windows, go to Start then Control Panel and in the search box type 'adapter.' Then find and click on View Connections. Check to see if there's anything disabled, and enable them if they are.