How to wick Your Artha V2 RDA? A: You need have coil building kit to make coils with cotton. You can also buy pre-made coils. How to make the right amount of cotton? A: Get the desired amount of Cotton Bacon and then roll it out. Then tighten the end and push it through the coil. You’ll know it’s the right thickness when there’s a bit of resistance on the coil. How long you need to change the Coils? A: Most vapors will change a personal vaporizer coil between every 1 to 4 weeks of usage. A general estimate would be 2 weeks, but you should always monitor the taste to look for signs that the coil needs replacement. How many Posts for this RDA? A: Artha V2 RDA owns quadruple posts with big hole.