Might be running too high powered for your build. Or not building up for your desired power.
Try a spaced coil build too. Prevents hotspots, so might not singe the cotton and juice as much. Betty has a ton of sweetener, so can really gunk up and burn at lower temps.
Round wire meaning plain single wire coils vs. clapton, fused clapton, twisted, even parallel. Might need to get more wire in there by one of these coil types, or just turn down your power on the mod.