hopefully someone will be able to help me with this problem its been bugging me for over a month now and i havent been able to solve it!!!

whenever it rains water gets into the car from behind the dash at the top somewhere around the center and ive had to remove the carpet because its getting soaked!!

ive reseal almost anything possible under the scuttle pannel, i.e the 2 large rubber gromets on the passengerside iv even gone to the extent of blamking off the cold air intake for the heaters because i thought it was running down the pipework into the car but i was wrong. it seems to be running down the outside of all the heaterpipework inside the car but just cant figure out how!!

the car is a 1997 1.25zetec fiesta 3dr