The caramel I mixed was too strong at 1%. The first puff was totally sweet and delicious like caramel syrup, but once it hit my tongue it was like perfume. I cut it in half by adding another 5 ml unflavored to it. I am letting it sit, I so hate that pungent perfume flavor. I had that issue with tiramisu as well, but finally got it tasting great at .4%. You might try lowering the flavor instead of adding sweetener, it works for me anyway. I do vape 80% PG which I think makes a difference and why I have to use less flavor. I do add a bit of sweetener to the gourmet fruits. The yuco is smooth and sweet at .5%, taste like my own extractions of blond tobacco leaves.