i use to smoke with a doob toob in my room every day for like like 4 montsh and never got caught its all about the quality, take you time and air seal it tight and put like half a kleenex in there it will filter out a shit load of stinky rezin rom the smoke. i use to pack like 8 xtra strength dryer sheets in a toilet paper tube and ild tape 1 on t0o one end of the tube.. as long as u have somome smelly candles or incents, u should be in tha clear.. open a window also it helps major