Yup, I use Cozzicon's isopropyl alcohol method as well! I clean my atties twice a week. It's kept all my atties trucking without problems. I even have a 2-month-old LR that's workin' like new. I've never lost an atty, and I've been using this cleaning method since the first time I tried atties about 5 months ago.
The only time I've had problems is when I neglected to clean an LR for 3 weeks. The performance really took a dive. I normally soak them in the alcohol for about 5-10 minutes, but I soaked that one for a couple hours, and it was back to vaping well.
I've even dry burned them a bit after they dried to see how clean they really get. The coil goes to orange almost immediately. This method works extremely well for me.
As others have said, you're probably vaping the primer fluid, and that stuff tastes none too nice. Blow out the atomizer into a paper towel before vaping, then after blowing it out well, put about 4 or 5 drops onto the atomizer, try it, and use one or two more if it needs it. Once you get it going, 2-3 drops will give you 10-15 drags.
I started with cartomizers as well. I found atomizers taste better, but the throat hit is less unless I'm using an LR. I am a big throat hit junkie, so I now only use LR's.