Can anyone tell me why me driver side floor is wet. I have not washed it in about a week and a half, and it has not rained in over two weeks. Could it be my heater core?

 

A/C drain tube could be plugged

 

I do not use my A/C. Will that make difference?

 

The A/C will still cut in from time to time when the defrost is on (they do this to keep the compressor and seals lubed).
If the leak is from the heater core you should be able to smell antifreeze.

But-- I miss read your original post-- this type of leak is normally on the passenger side under the blower fan.

 

I do not smell antifreeze.

 

I have this same problem and it comes and goes. It can absolutely monsoon and it will not always leak. Sometimes it does...sometimes it doesn't. Under the blower fan you say...first of all...I don't know where that is at. Second of all...how would I go about seeing if that is where it is leaking from?