After taking a few photos, I asked for opinions online. Responses came quickly—many suggested it could be mold or a buildup caused by trapped moisture. One knowledgeable commenter strongly advised me not to touch it again and recommended professional cleaning. That’s when everything started to connect in my mind: the lingering odor, slight window fog, and occasional sneezing while driving were likely related signs.
The next day, I arranged a professional detailing service. The technician confirmed it was likely a combination of moisture-related growth and mineral buildup forming in a hidden area. Thankfully, the issue was handled safely and thoroughly with deep cleaning and treatment. The experience taught me an important lesson—small, overlooked signs can point to bigger hidden problems. Since then, I regularly check my car, keep it ventilated, and never ignore anything unusual again.
