Step 1:
In a small bowl, combine the sweet paprika, hot smoked paprika, mustard powder, garlic powder, and a few generous grinds of black pepper. Stir until well blended.
Step 2:
Remove the ribs from their packaging and pat dry with paper towels. To remove the membrane from the back of the ribs, use paper towels to grip one end and pull firmly; it should come off in one or two sheets. If it proves difficult, this step can be skipped. Season both sides of the ribs generously with salt, using approximately 1 tablespoon per rack. Apply the prepared spice mixture, pressing it gently into the meat for full coverage.
Step 3:
Grease a 6- to 8-quart slow cooker pot lightly with oil or cooking spray. Stand the ribs upright in the pot, forming a circle with the meaty side facing outward and the bones pointing up. Cook on the low setting for 6 to 8 hours, or until the meat is fork-tender but not completely falling off the bone.
Step 4:
To prepare the hot honey, combine the honey, sliced chiles, and lime peel in a small saucepan over medium heat. Heat the mixture until it begins to simmer and foam, about 2 minutes. Remove from the heat and transfer to a heatproof bowl to cool. This glaze can be made in advance and stored at room temperature in a covered container.
Step 5:
Line a baking sheet with foil. Carefully transfer the cooked ribs to the sheet using tongs, positioning them meaty side up. Preheat the broiler. Remove the lime peel from the honey and stir in the lime juice and apple cider vinegar. Drizzle half the honey mixture over the ribs, ensuring even coverage while leaving the chiles in the bowl.
Step 6:
Broil the ribs for 2 to 3 minutes, monitoring closely to prevent burning. Rotate the pan as needed to ensure uniform caramelization. Once lightly charred and sizzling, season the ribs with additional salt if desired. Drizzle the remaining honey and chiles over the ribs before serving, and offer any leftover glaze as a dipping sauce.