A musty smell close to the windshield after rain may just point out a leak inside the seal or blocked drains that want immediate
https://atomic-wiki.win/index.php/From_Around_the_Web:_20_Fabulous_Infographics_About_auto_glass_Spartanburg
A musty odor close to the windshield after rain also can suggest a leak in the seal or blocked drains that want rapid recognition.