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Last year, a friend and I rented an Airbnb in Las Vegas. As soon as we opened the condo door, we were hit with a perfume bomb — plug-ins in every room spewing out a knee-buckling fake floral scent. The only things that saved the trip were a strong air purifier and our TSA-required Ziploc bags. We cranked up the purifier and immediately bagged and sealed the six air “fresheners.