The coffee maker was improperly used causing brewed coffee to back up into the interior, coating the heating element and other components with grounds and brewed coffee. The condition was exaccerbated by an attempt to clean it by rinsing it under water. It was necessary to dissemble the coffee maker to clean components and remove debris and moisture from sensitive components.
The repair went very well - and was possible only because the 26-bit driver kit arrived the same day as the mishap occurred. I couldn't have extracted the specialized chassis screws without the new tools.
Common sense, really: dissemble carefully, take progress pictures for reference (if necessary) and sort and lable all screws and fasteners.