You may be drawing too hard with your inhale technique. This is not like smoking a cigarette. E-cigs require you to take a longer, gentle, draw. Your iClear 16 (or any clearomizer) only has a few tiny string wicks bringing
e-liquid to the heating coils. Vape too strongly and the wicks can't keep up, and you end up burning the wick dry.
Also, are you using a variable voltage eGo? If so, you may have the voltage set too high for the coil. Don't set the voltage higher than 4 volts. Some flavors will taste burnt if you go too high in voltage, especially fruit flavors.
Being that the iClear 16 is a top coil/top wick device, as the liquid level falls in the
tank, you'll need to "tip" the tank horizontal to keep the upper wicks wet.