I vape my EVODs at 10 watts and don't get any burnt taste from them. I did find, however, that after refilling them I usually have to let them sit for a few minutes or else I do get a few burnt and dry hits off them. Also another trick is when you first get them, take them apart, dry burn the coil then add a drop or two of liquid to the wick before putting it all back together and filling them. I find it helps to avoid those first few dry hits when you first get them and it vapes a little more consistently. And if you're still having trouble after that, try removing a flavor wick (the loose wicks that sit on top of the coil/main wick assembly). Thicker (and sometimes thinner) juices tend to not flow so well into the coil with both flavor wicks installed and they will get a little dry while
vaping. I vape 65/35 pg/vg and have only one flavor wick installed. Hope this helps!