Do what Jake said, just bypass the fuel selector until you get a new selector valve.
The green (blue) goo is deteriorated glue. The CG approved fuel line is two pieces with a glue bonding them together, the ethanol in modern fuels breaks down the glue and makes a goo that gets into the fuel delivery system. If it makes you feel better the same thing happens to fuel lines in boats, I just replaced the fuel line on the pontoon, its a 2006 and the fuel line had started to break down.
Lou