Do you make a habit of touching live electrical wires?
Please understand all the black stuff you see is carbon and can conduct electricity.
Please be careful!
If you call masterbuilt they should have a repair kit.
To me it seems clear the number of failures is too high. Masterbuilt needs to redesign this smoker.
I for one have filed a complaint with the Consumer Product Safety Commission. If Masterbuilt were going to change on its own it would have done so by now.
If you have had a similar failure consider filing a complaint.
Not everyone has GFCI outlet that will detect bring this problem to your attention. It is only a matter of time before a MES a failed is operated without a GFCI and no ground and somebody get hurt.
I think everyone that uses a MES needs to test their outlet with something like the outlet tester the one in this link seems to be in stock at most Home Depots most hardware stores will have something like it in stock
If you were file the heater termanals down to clean metal and solder on the wires that type of repair has held up well.