My newly opened IGET King Iced Grape tastes burnt

As the title states, my newly opened IGET King Iced Grape tastes burnt!!?? I recently bought this vape from a local vape store, I waited at least 10 mins after opening and pulling that white thing sticking out of the vape before vaping it even though it suggests waiting for 1 min. After a few drags it tastes burnt. Never used to have this issue. I went back and told the store, they didn't believe me at first but I was able to get it replaced. However, the replacement also tastes burnt. This time I only waited 1 min but still the same. The tank is still full. Has anyone ever experienced the same issue? Is there a fix? Am I doing something wrong? I've tried priming the coil by blocking the air hole at the bottom while sucking but this only works for a few drags and then tastes burnt again!!!!????