how effective are doob tubes?

For a while now I've only had a mini doob tube (toilet paper roll), but just tonight I made a paper towel roll one with like 15 dryer sheets. Works so great.

the one i tried was horrible but i think there were only 3 or 4 dryer sheets used so thats probably why

They are quite ineffective, unless you spray some kind of cologne with alcohol in it, on the dryer sheets (this absorbs the smell MUCH better.

Ive seen smoke blown through just the sheets, and smelled the smoke that came out, and it was A little covered up, but the good bud we got down here is hard to cover the smell....

yeah, last time I used one I got caught for the smell, so thats a bad idea.

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

have always been very effective for me. i take a bottled water bottle and poke some holes in the bottom with a pen or knife or anything really then just stuff it full. i really havent used one or need to since msoking in the dorm rooms but it always worked for me there