I dilute my commercial juice with an 80/20 vg/pg mix. I just add it to the tank when im refilling. I try to eyeball about adding 1/4 to 1/3 to cut back a bit on the flavor depending on the flavor. It also tones down the nicotine a bit if it contains any.I though I'd check out a local vape shop as I haven't been in years and there are new owners, They had nothing at all of interest. 2 rda's, both dual coil, hardly any mods. No squonks a couple pods, it was sad. I did buy a bottle of vapetasia royalty 2 but those store bought juices have way too much flavoring for my taste now. I guess I'll just have to stick to online ordering while we still can. At least my * stopped hurting. : )