Okay, to help you, I need to know what the bad taste is like. Is it just a normal taste that doesn't bode with you well? Is it extremely bitter? Does it taste like burning paper? Does it taste like motor oil? Or does it taste like you'd expect sodered metal to taste?
If the taste, is just a normal flavor, you might just not like it, I've gotten juices that I can't stand. The solution here may be to let the liquid sit for a while. Some liquids don't taste very good factory fresh. If you're getting an overwhelming bitter flavor, you've got too much nicotine in your juice. Drop your levels. If you're getting a burnt paper taste, you're probably using cartomizers (a tube with polyfill and a atty in it), you've probably burnt it by not adding enough juice. If this is the case, ditch it, and pop out a new one. Fill until the poly looks completely saturated. Don't be afraid to overfill, if you happen to, just blow the excess juice out. Not hard. If it tastes like motor oil or sodered metal, you're likely using some sort of set up with a separate atomizer (atty) and some sort of juice delivery system (dripping, 3 piece set ups, etc). If you're getting a motor oil taste, your atty is factory fresh primed. This is no good. The flavor will fade with time, but in my experience, the best way to deal with this is to give the atty a nice hot water soak. You want it to be almost boiling; let it soak for about 20 minutes. Then shake it off, and leave it to dry overnight thread side down. The metal taste is much easier to remedy, you're just not getting enough juice on the atty. If you're dripping, just add more juice. If you're using any other system, you probably have some sort of faulty delivery mechanism. Or you might just need to prime the atty, that is, drip a few drops directly onto the atty. Be cautious with an automatic battery; you might flood.
If the taste, is just a normal flavor, you might just not like it, I've gotten juices that I can't stand. The solution here may be to let the liquid sit for a while. Some liquids don't taste very good factory fresh. If you're getting an overwhelming bitter flavor, you've got too much nicotine in your juice. Drop your levels. If you're getting a burnt paper taste, you're probably using cartomizers (a tube with polyfill and a atty in it), you've probably burnt it by not adding enough juice. If this is the case, ditch it, and pop out a new one. Fill until the poly looks completely saturated. Don't be afraid to overfill, if you happen to, just blow the excess juice out. Not hard. If it tastes like motor oil or sodered metal, you're likely using some sort of set up with a separate atomizer (atty) and some sort of juice delivery system (dripping, 3 piece set ups, etc). If you're getting a motor oil taste, your atty is factory fresh primed. This is no good. The flavor will fade with time, but in my experience, the best way to deal with this is to give the atty a nice hot water soak. You want it to be almost boiling; let it soak for about 20 minutes. Then shake it off, and leave it to dry overnight thread side down. The metal taste is much easier to remedy, you're just not getting enough juice on the atty. If you're dripping, just add more juice. If you're using any other system, you probably have some sort of faulty delivery mechanism. Or you might just need to prime the atty, that is, drip a few drops directly onto the atty. Be cautious with an automatic battery; you might flood.