You must also be warned about doing lab techniques with home chemicals is of course dangerous.So if you are using zippo fluid, kerosine, or some other form of naptha to extract DXM when you get to the final solution of DXM make sure you evaporate the water off to completeness so you get a crystalized product and then redissolve in water because the could be something like benzene in the naptha that is very poisonous, is azotropic with both the naptha and the water meaning the benzene will dissolve in the water from the naptha and cannot be separated from the water, so the DXM must be completely dry.