My Notification bar won't roll up ? I am using Motorola Defy Android 2.2. But I am facing a problem with touch screen. The buttons at very lower end of the screen don't work i.e touch at the very lower end don't work. That's why after pulling downing the notification bar I am unable to roll it up back. I am even unable to use apps that have small buttons at very end of the screen. To use them I have to rotate the phone.

Please help me out.
Like Al said, it's most likely a hardware problem, but to address the title question: you can roll the notification area up with the back button.