Just a tip for you. I noticed you're using vinegar. While this is fine and will work well, citric acid works equally as well, and has the added benefit of not stinking up the place

The procedure doesn't change. I recommend using 2-4g of citric acid per 50g bark, per extraction. If you have pH strips, then you can fine-tune this number (and probably get away with using a lot less citric acid)..but it's not all that vital.
Citric acid's dirt cheap and very available, too

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I've also heard good things about ascorbic acid, and I am a bit curious since it is a mild reducing agent. This could perhaps keep the DMT from oxidizing and ultimately yield less gunk. However, that is all speculation, and ascorbic acid is much more expensive than citric or acetic.