So I am glad you did your research. That foul smell you...
User ukmusha, in the MushroomGrowers subreddit,
So I am glad you did your research. That foul smell you asked about in the post? That's called formaldehyde. It smells like that.
Acute in vivo pulmonary toxicity assessment of occupationally relevant particulate matter from a cellulose nanofiber board
Overview of attention for article published in Nanoimpact, February 2020