Baking wood liquor

With the remaining wood liquor from my cooking, I wanted to test evaporating it off, the times it'll take and the residue left behind.The liquid is reluctant to let much water evaporate away.  The wood liquor with crushed charcoal left a very interesting goo.  This test was done a month ago and the goo is still drying / hardening.  I'll definitely keep an eye on it, as well as make a bigger sample to cook further.