Got a puddle appeared in my drivers side foot well, heater matrix is fine, defo no leak from the sunroof, windows etc, had all the carpets up and checked for holes in the floor so it's not that either.

Thing is, there's no sign of where it's coming from cos there's just a puddle in the footwell, no trace of water running down from anywhere, and the carpet is bone dry everywhere else.

WHERE'S IT COMING FROM?!!!!!