I have a 2004 Forest River Cardinal 32ft fifth wheel. Under the trailer, where all the tanks are located, there is after-market corrugated metal sheeting all the way from side to side, and would be very difficult to remove. I've asked the manufacturer, they had no suggestions. There is a steady drip coming from inside this sheeting, by the edge. It's been the same amount for maybe two months, while I've tried to get a mobile tech to come. Not even the dealer will do it because it's hazmat. So - I'm hoping to trace the source of the leak to which tank it is. If it's the grey or the galley, then I'm not so worried about the tank being cracked and a bigger leak coming. I was wondering about putting dye in the grey and the galley, and seeing if I could spot the color as the water drips to the ground. Seems like I might need a lot of dye? any ideas? Thanks!