iPhone 4 screen scramble

I've had it around 5 months and it has taken a couple small drops onto the ground on the side of the phone but this scrambled screen came out of nowhere.



It comes up like pictured when the screen is asleep and i hit the home button, lock button, receive a phone or text etc;. It quickly goes away if I hit the lock button twice.

Just wondering if there a quick fix I can get done or if I should send it back to Apple, if they even cover this in the warranty.

Thanks for taking time to read this.

DJ

 

bump?