stop cigarette smoke coming through vents How to Block from AC Need suggestions to prevent cigarette

Need suggestions to prevent cigarette and weed smoke entering house via windows. : r Home how to stop cigarette smoke coming through windows Here's how I've been keeping the smoke Weed smell coming through my vents, the apartment says nothing is connected. In the hallway I cannot smell it, only in my apartment. I've replaced the filter and cleaned, used air freshener How to Stop Cigarette Smoke from Coming Through Vents Frequently Asked Questions Thirdhand Smoke Resource Center Smoke coming from my ac vents and its not humid outside what do I check to fix this?

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