In Jewell's own words.
Performance Shooter: What maintenance does the trigger require?
Jewell: I recommend they use it clean and dry. No lubrication whatsoever. The metal surfaces are hard as hell; they’re heat-treated to a 58 or 59 Rockwell C hardness. We don’t have to worry about galling because the loads are so light at the sear.
Performance Shooter: Still, no mechanism is perfect. What’s the biggest problem customers have with the trigger?
Jewell: Allowing it to get dirty. They’ll let that Shooter’s Choice cleaning solvent get down in there, and I’ve seen that stuff actually solidify. I’ve seen these parts welded to the sideplates. People will let solvent trickle down into the action when they’re barrel cleaning. It will eventually build up and make the trigger quit working. But because my triggers require so little effort to make the levers move, they are probably more susceptible to getting gunked up.