Hi, Failariel.
Three elements in 2-1/2 years doesn't seem normal to me. As you read above, I got 4 years out of my first muffle with daily use. Perhaps there is an underlying problem that may never have been corrected. Maybe something about the way the kiln is wired??
As you've read above, Arnold Howard of Paragon reached out to help when I was having trouble. His email address is
ahoward@paragonweb.com. I'm not certain but I think he is one of their engineers. I would approach him directly. Hopefully he can figure out the cause of your kiln's recurring failures and get it straightened out.