Thanks for letting us know about this. We're sorry to hear of your experience. We'd expect each Glade® Plug-In to fill up a room that's 10 x 10 or larger with a strong fragrance. However, air flow and location of outlet can affect the strength of the scent. If the room is more spacious than others, we recommend using more than one plug-in. We'd like to talk further to best assist. Please give our experts a call at 1-800-558-5252 (weekdays between 8 a.m. and 5 p.m. CT) and provide reference number: 22947863. We'd like to help perfect energy of any room! – Mindi, SC Johnson Consumer Care