Share 'Big wet spot on driverside.'

I have a big wet spot right under the steering wheel. The car does not have a overheating issue, and I don't smell antifreeze. I have never seen water dripping from under the dash. It seems to get wetter after a drive, when it is wet out. Is there a plug under the carpet? I haven't had a chance yet to do anything yet. Thanks for any help you can provide, Carter