I have a Dive Rite 10 watt HID canister light. I found a little bit of water inside the battery canister last night (just a couple of cc's- freshwater). I could tell by the moisture at the top that the water was coming in through the lid. After thoroughly looking the unit over, I found a nick out of the cord's outer covering. Not seeing any other defects or possibilities, I'm assuming that the cord is my problem. How hard is it to change out the cord? Or should I just send it back to Dive Rite to have it done?