I struggled with wicking for a long time. Now I squeeze 70vg/30pg through my Subtank Mini RBA daily. The trick is to use less cotton, just enough to create a little resistance as you pass it through the eye of the coil. Snip the bunny ears 5mm above the cleat. DON'T PACK THE COTTON DOWN. Just gently push down to cover the two holes - there must be a void below the holes to draw more liquid up the wick. I haven't tasted 'dry-burn' in over 6 months. Persevere mate... It's well worth it!