Fuel tank wet on drivers side
 

2004 6.0, The side of the tank (or tank cover) is wet and pretty sure its fuel. I thought at first it was due to me over filling the tank, but I'd used brake clean on it a few days ago to clean off any residual fuel and it's back. Most likely the O ring at the top of the tank?

https://mystuff.bublup.com/ui/landin...f-15665e3148fe

https://mystuff.bublup.com/ui/landin...7-a5cf2f35d60bhttps://cimg0.ibsrv.net/gimg/www.for...95f78f5143.jpg
underside shot
https://cimg6.ibsrv.net/gimg/www.for...bae6dbe875.jpg
side shot