i think this would work for you, good luck. i wouldnt try any of those fresheners because they arent going to work and if people smell a bunch of fresheners they are gonna be like what smell is he trying to cover up? but thats my opinion..
http://www.amazon.com/Hydroponic-In...DECS/ref=sr_1_3?ie=UTF8&qid=1326077256&sr=8-3