BOSCH 6017C HEPA Cabin Air Filter - Compatible with Select Chrysler Town & Country; Dodge Grand Caravan; Infiniti EX, FX, G, M, Q, QX; Nissan Armada, GT-R, Titan; Ram C/V; Volkswagen Routan + More

I had the same observation from time to time. I changed my cabin air filter to a HEPA one, which seems to have a little less airflow than the OEM filter, and that has totally fixed it. Maybe a 15-20% reduction at the lowest fan setting, but still puts out more than enough air at full blast if I need it. This is the filter I have: https://www.amazon.com/dp/B01JYSW5XI?th=1