Can't get Wii Remote to turn on, even with new batteries

If your Nintendo Wii Remote will not turn on, use this Nintendo Wii Remote Won’t Turn On problem page for possible causes and solutions.

My best suggestion would be to open the controller up and inspect for any corrosion or water damage. From the sounds of it, this is probably the case. If the inspection doesn't come up with any leads then the only other suggestion I could make is replacing it with a used one off eBay. They're very cheap now and it's the most economical move to save time and/or money.

Good luck.