Ive seen the "how to clean" vids however I guess Im just curious to see how many of you have been in the same boat. 1st ecig, 1st cart I vape til I taste the burnt taste, Is it toast? can I refill it? Now I bought all prefilled carts with my ecig, not knowing what I know now. out of the 10 flavors, I only like 3. Now have have some juice that arrived today but none of the same flavors I have in the prefilled. Can I simply clean out the prefilled and pour in the new? 7 of the prefilled only have about 3 or 4 vapes taken off them. Unless I get the exact same flavor, do I just need to stock up on blanks. I could see where that would get pretty pricey and with sampling flavors what do I do when I fill the blanks with a flavor that is not going to be used. I guess in short, whats the most economical way to sample flavors, with me being new to the game I havent found that go to flavor yet... And I can see my self trying to try everything I see lol...