just go with the window and febreez. my friends and i did that one night, we kept the window open and turned a fan on. we closed the window an hour later and left the fan on. but it was like 20 degrees out and when they saw that the fan was on they asked if we were cold. my friend was like "maybe?"

the bathroom method worked once for me... second time i got caught, but i was being stupid. first time i changed my shirt... second time i didn't change my shirt... got some food in the kitchen, and my mom went sniff sniff. my bathroom has a vent and a fan though.

basically.. do the window.