okay so quick question: im used to vaping on a 3mg liquid and recently ran out however a friend of mine gave me liquid she no longer uses but its an 18 and a 12. I was wondering how much of the store bought vg/pg i should mix the liquid with to get it to a 3mg? I have the store brand bought from my local cvs and wanted to use that to bring down. Any info would be greatly appreciated
thanks!