pyotr filipivich fired this volley in
:

If you are getting methanol in your product, something else
is wrong.


The primary "rough" content in a first-pass distillation from ordinary
grain mashes is furfurals. They taste bad, are moderately toxic, and
cause one banger of a hangover, even in tiny concentrations. There are
also some undesirable acetates and oils present in the first pass.

There is not normally any significant methanol content unless the
"still" is hot enough to destructively distill... not likely if there's
still any water left in the mash.

LLoyd