I use tiny rdas. Smaller is definitely better flavor but your coil build and wicking will also affect what you get as others here have said. I change my wick every day or every 2 days depending on how heavy I vape. My diy ejuice is a very sweet dessert and I like to have the purest taste. Could I go 3-5 days without changing? Sure but I enjoy a fresh wick every day or so better.