Clear liquid leaking

Even when you do not have the AC on in modern cars it may still run to dry the air going into the cabin. That prevents things from fogging over if it is humid and you are using any of the defrost or windshield vents. That would be about the only cold clear liquid on a vehicle. Only sure way to tell would be to put the car up high enough that you can get under it and see if you can find the source, or you could put a pan/bowl under the leak and collect some and see what it is that way.