Vapor wise,mine has a lot just that,after one/two vape,the hot spot with the burn taste is really killing the throat.
In the case of rebuildables, if your coils are glowing evenly, and you are tasting burnt taste after 2 or 3 consistent vapes, it may be wicking issues.
1) You may improve wicking by tilting your genny to the 3 O'clock angle whenever you are taking a toot.
2) Use loose fitting tightly rolled mesh for your wick. E.G: Wick hole size is 2.5mm, use about 50mm of #500 mesh or 45mm #400 and roll it as tight as you can, achieving a wick with a pin sized hole and a diameter of around 2.2mm.
If AGA-S has the same configuration as the T (that is 1 wick hole + 1 fill hole), and the fill hole size is equivalent to the wick hole size, try number 2.
Different ppl are getting different successful setups with different materials and different configurations for Genesis setups. Go with what you think suits you best.
Sent from my mind using Haki.