After being super paranoid about having a clean solvent it led me to wonder, what exactly would happen if you smoked your gear with residue from dirty lighter fluid? Surely if you were to put the stuff in a zippo and light your cigarette with it it would be exactly the same as smoking some left over on your spice.

Why risk it? Health is wealth.

When I first started extracting, I wasn't giving my crystals ample time to full dry (at minimum they should not smell like lighter fluid when you go to smoke them), but basically the vapor just tasted like DMT and a hint of lighter fluid, which can be a bit unpleasant as far as taste goes, but regarding the subjective effects of the experience, nothing was really altered, and I didn't get sick or anything. Besides, if I remember correctly lighter fluid has a surprisingly low neurotoxicity and LD-50. In any case, just take the time to make sure everything is nice and clean. No reason to cut corners here.

yeah im not suggesting anyone should cut corners, cleaner is always going to be better i was just wondering if it was worth all the stress hunting for 100% purity, after all i dont think ive come across a drug yet thats 100% pure

Its not about "100% purity", its about what is the impurity. 10% of another active alkaloid or inactive harmless plant oils is one thing, 10% of toxic rust inhibitor, heavy metals or some carcinogenic substance is another thing.

How could anybody answer the question "how bad is it"? I mean, considering the fact that these "fuels" dont need to be so pure because their intended purpouse is simply burning, there is neither a strict regulation about what are the potential impurities like there would be for a product meant for ingestion. Also, the composition of these fuels can change over time (maybe they find a better rust inhibitor, or a substance that improves burning potential or whatever), so one can neither make generalizations. It depends on what this potential impurity is, how much you consume, how you consume, etc.

Doing an evaporating test, only using if it evaps clean, and washing one's solvent before extraction with a dilute acidic solution and a dilute basic solution, all are ways to help improving your chances of not having problems, if you dont have a certified analysed chemical and/or are using a non-toxic solvent (both of which would be the ideal way to go, if it's in your power to do so).

Also, check this thread for some relevant coments:

https://www.dmt-nexus.me...aspx?g=posts&t=11715

"I mean, considering the fact that these "fuels" dont need to be so pure because their intended purpouse is simply burning, there is neither a strict regulation about what are the potential impurities like there would be for a product meant for ingestion"

I understand what your saying but my origional point was if one is using lighter fuel that is intended (and if you smoke is used often hourly) to be burned and inhaled , how can burning and inhaling it combined with dmt be any worse?