Great so to give a report to you guys, the 10mg/ml did eventually dissolve within a couple hours of shaking, heating, stirring, letting it sit, then repeat.
The reason I was using such a high concentration is that the only PG available in my area was from a vape shop an they sold 10ml bottles for extremely expensive.
I'm not going to be in the country for long enough to wait for an amazon shipment of PG or else I would have ordered a quart for $15.
Once it ended up dissolving, I realized my syringe had a leak in it and wasn't pulling up the liquid correctly (It would just fall back out, how stupid). I tried tilting it to get at least some to stay in, and while doing so (already had taken a little bit of Etiz), I poured the whole bottle all over myself. In a panic to at least gain something out of it I
starting sucking on my shirt where some of it soaked in.
I can't remember anything past that point.
Anyways, moral of the story, it might take a long time but you can dissolve 10mg/1ml.