i got my vivi nova (2.5ml) and ive been using it for about a week now.  I'm using a VV spinner with freedomsmokeUSA 70/30 vg/pg mix (Cappuccino flavor).  I'm also using the 2.8 ohm wicks on it but for some reason once i go past 4 volts i keep getting that burnt taste. i also get a burnt taste when it reaches around about 1.25 ml of liquid.  can someone tell me what im doing wrong or what i should do?
	
		
			
		
		
	
			
			 
				
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		