Yeah, it might be burned then! Your taste buds might be hibernating - usually it's a strong nasty taste, but if your wife smells it I'm thinking you might need to take it out and clean it well - hot water then vodka or dental cleaner soak overnight. When it's dry put it back on and I'd not go above 4 and see if she smells it then.
The dual coil says 2.0 ohm