I think vaping is always the way to go. In the post I was writing about vaping purified extract. I get my cbd from a local e cigarette shop :) pure extract. If you vape ingrown herb there will always be some contamination. I think at higher temperatures there can be some combustion that releases some new chemicals like aldehydes (formaldehyde) that are not good to breathe in. The goal of vaping is to keep the substances intact while delivering them.