i missunderstood what you were talking about when you said cowl

i just went and high pressure cleaned the car and found water running behind the kick panel from up where you were talking about

if you stick your head in the footwell and look up in the corner there is some silicone type stuff where the two metals meet, i had water dripping out here

not to mention the rear window seal, boot seal and both quarter windows on the front doors, oh and i think one of the back wing windows was leaking too

no wonder all the carpet is rotten! and the car stinks