I dont think it interferes with anything. The water doesnt dissolve freebase DMT. It will just freeze and make ice in your naphtha (you might mistake it for dmt), but after removing from freezer and filtering/letting dry, it will melt, become water, and finally evap, leaving your DMT behind intact. You just might need a bit more patience so that it evaps away when your crystals are drying, thats the only real problem I can imagine happening.