Cabin noise in my 00 q45

[Q45-pj]

It always sounds like my sun room is open when I'm at about 40mph the cabin noise is insane. I was told by one person to get new tires. Since I'm due for some new ones anyway, I'll find out if that's the culprit. Another person suggested I try lining the door panels w/dymatize. I don't know how well that's going to work. I do remember the first time I took the car to a car wash after picking up from previous owner (the dude was gross, total slob) some of the soap suds were dripping in the sunroom. What was interesting was the size of this open space spanned the entire width of the sunroof. The back of the sunroof to be exact. It seems like that's where the sound is coming from but I can't feel the air come in. This maybe due in part to me actually driving on the highway which makes diagnosing a bit difficult. The space in the roof seems like it's still there but water no longer seeps in for the car wash. This only happened in the car wash never in the rain. Usually from the heavy mop like sponge things slamming on the roof. I also noticed what might look like a water stain on the sunroof cover.
I hope my description is good enough to give you guys an idea of what might be the problem.