Ok, after almost a week of tank bliss, I got my extra tanks (small) with the dual 2.0 cartos. I carefully took out the included 1.5 carto and put it in my new tank. Then I followed carefully the steps that dear Snow had outlined in his video, including blocking the end and drawing a few times to pull the juice up into the batting, and also adding about 10 drops of juice to the top of the carto.
Went to take a nice hit, and blehhhhh! I got a mouthful of burned tasting nastiness! So I took it off the batt, plugged the bottom and took some more draws thinking maybe I hadn't gotten enough juice into the carto, added some more drops to the top of the carto and tried again... blehhhhhhh!
I have no doubt it is user error, but I have been doing this for almost week now with no mishaps... any ideas?
Thanks in advance!
Went to take a nice hit, and blehhhhh! I got a mouthful of burned tasting nastiness! So I took it off the batt, plugged the bottom and took some more draws thinking maybe I hadn't gotten enough juice into the carto, added some more drops to the top of the carto and tried again... blehhhhhhh!
I have no doubt it is user error, but I have been doing this for almost week now with no mishaps... any ideas?

Thanks in advance!