touch screen no longer reacts to touch

Just read about your website in the paper, so I want to give this a try. We have an Ipod Touch 2nd generation that stopped working a little over a year ago. It would no longer react to touch. As we had password protection on the device, it was impossible to start the device. The Ipod Touch was in a humid environment (my son took it in the bathroom while he was taking a shower), but it did not get immersed in water.

What route of action do you recommend for repairing this item?

Thank you!

Beate