I agree with at least 6 inches, and although i have heard many different things used to keep a mohawk work, the only product I can back from personal experience is Big Sexy hair tease in a bottle. It's not cheap, but your hawk wont move even if you sleep on it.
Login using the form on the top of the page to post feedback (if you are a registered user). If you have not yet registered, click here to do so. It's FREE!.