If you haven't done an initial clean, give that a shot. I do a scalding hot water and dawn soak with everything that juice will touch, with the exception of wicking material. Throw your deck on an ohm reader to be sure you aren't getting a short. Additionally, there are two non-steel replaceable parts on the build deck and they're both delrin (I believe) insulators/isolators. If you're still getting a burnt smell, these might be involved.