Another thing you could try is to thin out your new eliquid. In your original post you said you used the 60VG/40PG with no problems. Your new juice is 70/30. If you can get some regular PG, I would take a little of the 70/30 juice and put it in a separate bottle to experiment so you don't screw up your whole bottle. If you don't have access to plain PG, get some distilled water (don't use tap), and add a few drops to 1 ml of eliquid and mix well. Then, try to vape to see if you're still getting dry hits. If so, add another few drops of distilled water to your eliquid and try again. I've done this with some of the old set ups when I first started vaping, it works well but you have to do it only a few drops at a time or you risk getting watery eliquid you can't fix or vape.