Im gonna change my tune and Ill tell you why.
I have made mixes with different brands of vg, from different places. Ive used walmart humco, rite aid brand, bull city, pinkerton labs, florida labs, myfreedomsmokes, aura cacia organic, and highdesertvapes, and I think theres a couple I dont remember. I go with whatever is cheap or easy (giggidy).
Point is, until post #13 I couldnt tell a difference between them, all my mixes came out fine, no funk, all good. Until a couple days ago.
I had a new sealed bottle of humco that I bought a month ago. So, I made a 30ml mix of 'pauly sweet cookies' (4ml vapertek nic) referenced here
http://vapingunderground.com/threads/my-first-true-success-paulys-sweet-cookies.55993/#post-349453 this past saturday. I let it sit for a couple days, I tried it, FUNK CITY! WTF REALLY?? I changed coils, wicks, and cleaned my rda. I tried it again, HOLY FUNK!
I was freakin astounded, that had never happened before. So I went down to the health food store and got some organic vg, problem solved. I just made a new batch last night, shake n vape perfect. I did test it side by side with the other mix. Sample1: funk, Sample2 NO funk.
Conclusion: I think its possible that certain batches of humco have yucky shit in it. Ive used probably 3 bottles of the stuff with zero issue. Bottle number 4 was the deal breaker. Im really surprised and sad to report this, because I liked being able to get vg at walmart. Well, Im done with that.