I've been cleaning my janty yentl atomizer with good success. I've had it for right around a month now and its still going strong...and I was having the same problems you have had.
First I use a small, round tupperware container with a lid. I fill it about 3/4 of the way with a 50/50 mixture of hot water (as hot as I can stand to touch) and white vinegar. Drop in the atomizer and agitate for about 5 minutes...I usually move the container in a circular motion...so the atomizer spins around inside like a centrifuge type motion. Then, let it sit for about 30 minutes. Take it out, rinse under hot running water again, blow dry with a can of compressed air, redrip with liquid and it goes back to being golden again. For me, it gets rid of any draw problems, the burnt taste...works great for me. I might have just gotten a rock solid atomizer...but who knows...can't hurt to try it out.