I considered that it could be trace amounts of IPA so I've been letting it dry for the last few weeks. Should be good now.. I'm just nervous to try again and develop those symptoms. The initial experience was amazing but those symptoms developed a few hours later and lasted for over 24 hours. Not fun at all. I'll have to try again and report back at some point.

I'm definitely not intolerant to alcohol haha but smoking trace amounts I could see causing issues. I remember the changa flaming up briefly when I first lit it and I thought it was just the mullein but maybe there was some IPA left over in the spongy mullein.

Anyone else have similar experiences?