Floors on passenger side wet

Most likely a disconnected or clogged air conditioner evaporator hose: https://www.youtube.com/watch?v=oYtK3GjS...

That's why some cars leave a wet spot while running and sitting in the summer time with the air on. But this little drain tube, usually rubber, sometimes out the bottom, sometimes out the firewall can and often does get plugged. It usually about as big around as a pencil. Either with crap picked up through your outside vents, or because a nasty algae grows in there sometimes. If it is a plugged tube, you have to find it, either via a repair manual or by knowing what you are looking for, and running a wire up and down through it to knock out the crud. With it plugged, the water will back up and come out on the carpet.

The rear window is probably not defrosting because the ambient humidity inside the car is to high, not allowing for evaporation.