I actually have a really good suggestion. I know I'm new, but I do my research.
I've found out that removing the wick inside the atomizer will drastically reduce the burning flavor you get sometimes. There are videos online how to remove the wick and it's super easy and requires only a toothpick. Sometimes, the wick next the coil will dry or move out of place and get "burned by the metal heating coil". I took the wick out of my 1st 510 to find that it was dislodged from the bridge and resting on the coil. You can imagine the burnt look it took on, haha. I drip, so sometimes when I realize I'm running low on
juice and need to drip again is when the wick is "dry" and will start to burn.
I hope this helps you as much as it helped me. Now, I know when I need to drip again solely on the fact that I'm not getting as vapor instead of getting a hot burned throat hit.