Dim / Dull Screen

I'll start by saying Hi :)

A few days ago I bought an anti scratch vinyl front and rear cover for my iPhone 3GS.

followed the instructions and used the supplied water spray to help manover vinyl film.

spraied the sticky side of the vinyl and applied to front screen, then used the smoothing out air bubbles gadget to smooth out the air... some water did go into the speaker outlet. wasn't a great deal but since then my screen will not light up.

adjusted brightness settings and turn on and off the auto-Brightness opition, but still very dim screen. so dim you need to tilt the screen into the light to view anything.

What can I do :S

Thanks in advance for your help