mysterious methanol leak

[mt057]

I am losing methanol quickly and I don't know how find it. I lost about a gallon last night while the car was sitting. It seems to drain below the line feeding the pump from the tank. So far I have not found any pooling. Should I put water with food color in the tank and look for the leak? Where is the best place to look first? Can the jets leak if the system is off? The lines leading to them are dry. The system has be working great for over a year. I run 100% methanol as instructed by the installer. Thank you for your time/help.