Sorry ahead of time for long list of questions.

Also might be a repost but my apps having issues and not showing if it posted.

So I use a geek vape posidon, using a 50-60w z coil in a geekvape mod with it, the touch screen one. I just changed out the coil and after about 4 days I get a dry hit then it re wicks and taste fine. FYI I am very anal about cleaning and wicking my mods a ton before use and i can't begin to fathom why it tastes burnt from time to time then goes back to normal. I always fill my tank after it starts to get below the wicking material too. Are these coils just not good because this has been an ongoing problem ever since I got this mod and tank. It's not just this pack of coils this coil is brand new and it has been happening with the last 12 packs I've bought. Every coil too. Any recommendations for a better atomizer for taste and coil life? I've been looking at horizon and freemax. What's your opinions? Thanks ahead of time for any tips trick or info!