Here is a video.
I've found a little trick to help find bad blades in a new pack.
The good blades will help ALOT with tracking.

After going through 4 new bags of matching # blades I've only found full two sets that work.

http://youtube.com/watch?v=_7PwNTXOWMs

I brought the water up to a full boil then dropped the blade in for one minute.
Success! It worked. Here's a video.

http://youtube.com/watch?v=RmNv8OlG6GQ

NOTE! Some blades take longer then 1 minute, Boil them for 5 mins