A tall form Pyrex or similar heat resistant glass beaker is probably the best to use. After boiling for 5 minutes decant it really fast into another container leaving the impurities in the bottom of the beaker.

You can’t use a filter because the bufotenine will start crystallizing as soon as the xylene stops boiling so it will crystallize right inside the filter structure and clog it.

There’s probably some bufotenine in their along with a lot of other junk. A second proper xylene boil might help clean it up a lot. Or maybe a xylene defat prior to a xylene boil.

Note that the xylene only needs to be at a very mild boil for 5 minutes, not a vigorous boil. It might be hard to do the xylene boil trick if using snuff. Its easy to do when using an extract because all the insoluble toxins stay at the bottom of the xylene as a dark brown thick syrup. It's very easy to decant it and leave behind the dark brown syrup because the syrup is easy to see and pours very slowly compared to the xylene.

I think a lot of the bufotenine would have probably got stuck in the filter used earlier.

Bufotenine has a boiling point of 320 C (608 F). Most commercial electric vaporizers cannot get hot enough to vaporize bufotenine. You’ll need to use a flame. You need to smoke it like it’s salvinorin A.