1-Ok, so you and pop love reds and black and milds..enough said. If you use a 510, batting in the cart must be THIN. Like 1/2 of what u normally see in a fresh empty cart. White fluval works great too, its what I use- all fluffed up, very light cut to exact size. You can use blue, but it floods easily. Youd be amazed how little of the white batting will hold your liquid without flooding, but allow a great consistent vape.
2- more than 5 seconds on a 510 and you risk burning the wick
3- if it gets red in under 5 seconds, its generally at the end of lifespan.
4- if your going ego with LR atty, you can use carts and blue fluval. blue fluval cut to exact size of cart will flood like noones business, BUT on LR you'll burn liquid twice as fast..its a perfect combo. dripping is inconsistent vape and annoying. But 5-6 drops or full cart blue fluval, and you have steady flow until empty..(don't vape a whole cart in one sitting)
5- go for 24 or 36 mg on 510, if LR drop to 18-24, or get ready to choke

6- proper 510s work well. If its off, then nothing short of experience will help you figure out why, and if its fixable, or just bad atty. Joyes wicks have been misplaced as of late, its causing issues.