intermittent fuel leak on my international 4900 98 dt466

[bob00]

hi,

i got a strange fuel leak near the passanger side primary fuel filter on my truck
some times it leak like crazy sometimes just a bit but i can never see it

i try remplace the filter but no luck it still leak all the passanger side outside the frame is soken wet of fuel from the rad to the fuel tank

any idea ??

and any sugestion of a good degraser or any other stuff to clean that mess