2006 Dodge Charger seems to get hot underneath the car

i noticed when i wash my car, and do the undercarriage wash when i go thru a car wash.. the car gives off alot of steam.. and when i stop the car right after, steam comes up from the car and under the hood and some up inside the window. and i notice the inside of my windshield gets this film on it and its so hard to clean off. i figure something is running hotter than normal, there's also some fading with the paint on my driver side doors.. the sections near each wheel.. im assuming its from that. i dont know much bout cars but i know ive never had a car steam like that after goin thru the car wash. is this normal for a v8 hemi? i have a warranty and i want to know if its something i can get fixed. i know it shouldnt make my paint (the glossy coat) fade on the doors unless theres a problem.