I need help i currently have a 1.9 TDI on a 2001 plate...

Currently under the car mat whilst cleaning i discovered a patch of water... the actual mat was dry and there was no means of the water getting through the mat or it would be noticable....

The water seems to reaccure as i cleaned it out with a cloth and whilst an hour of driving the carpet was damp once more....

I really need help someone did suggest it was a heater Matrix but i need to reassure and how much it cost...

Thanks Loads
Anzee