The shower thing works pretty well. However, it doesn't work as well with blunts and joints because of the excess smoke. If anything, smoking a joint or blunt in the shower makes it worse because the smell hangs around longer.

I just basically turn on the fan, put a towel by the door, close the A/C vent, and run the shower. When I'm ready to get into the shower, I open the A/C vent back up to help circulate air.