Reddit mentions of Allied Tools 2 PC. Stainless Steel Wire Brush Set

Your coils in both shots have a significant patina and your cotton looks too used and slightly burned, both of which will severely affect flavor. I'd recommend getting these brushes and once every two days or so (unless your juice is very very sweet) pulling out your cotton, and gently brushing down your coils to remove the gunk while rinsing under cold water. You'd be surprised at how much better your vape will taste!