The sky is looking pretty good here FourTwenty4Life - nice and sunny, especially for early May :thumbsup:

I had my volcano for over 2 years before it dawned on me that I could breathe back in the bag.

I was sitting there exhaling and watching all this lovely vapour catching the sunlight and then thought ZOMG! I'm breathing out the good stuff!

I kicked myself for not working this out sooner.

It does work but you just need to go easy, don't let the CO2 build as t00fatt mentioned and watch the water vapour too - you will see some in the bag, usually the next bag clears it and I haven't had any problems overall. You can always take a few lung-fulls of non-vape vanilla air in between your hits to be sure.

I'm not sure how much vapour is 'lost' when you exhale but the fact that you can see it means it must be a reasonable amount. Recycling back into the bag gives you a one-man vapour hotbox