quick leak check tip for seals..
turn your ac fan on full blast, set the it to fresh air mode and roll up all the windows and close the doors. give it 5 minutes or so to pressurize (i know i know, fans = no "pressure", do it anyway
). take a spray bottle full of soapy water (car wash soap works great, basically anything that foams up really well) and spray down anything you think could leak.. between the glass and door seals, windshield seal area, etc.
if you dont want to make a soapy mess, you can use a stethescope to listen for air leaks using the same method... takes some getting used to as you're gonna hear all the seals leaking a little air, you just have to determine how loud a leak is before it leaks water.. harder, but again its dry and faster.