you should first try to dry out the iPod completely before plugging it in.
I've heard that storing your device in a container covered with uncooked rice for a day or two will help dry it out. the dry rice will absorb a lot of moisture.
I've not tried the rice trick myself, but my flip phone went through a full wash & spin cycle. didn't work at first but taken apart and given about a week to fully dry out, it started working again.
good luck