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Kosher salt dictates the structure of this rub because its crystal size matches granulated spices evenly, preventing clumping and allowing for an even coating across the meat. Large flakes adhere better to surface moisture than fine table salt. Whisking the dry ingredients thoroughly before application breaks up static clumps formed by onion powder and smoked paprika. Spices containing sugar and dehydrated aromatics store well in airtight glass containers for up to six months in a dark, cool pantry. Humidity degrades ground spices quickly, so ensure the storage lid seals completely. Freezing the mixed dry rub is also viable for up to a year, though bringing the blend back to room temperature before handling prevents condensation from forming inside the container. Utilizing fresh garlic powder versus older commercial jars yields a sharper pungency due to volatile oils that dissipate over long shelf lives. Preparing the rub days ahead allows the salt to partially dissolve into the spice matrix. Removing the tough peritoneum membrane from the bone side of the ribs requires friction; gripping the tissue with a dry paper towel prevents slipping once a butter knife lifts the initial edge. Operating at a steady 250 degrees Fahrenheit prevents the sugar in the rub from burning during the extended cooking process. Wrapping the ribs in foil after three hours traps internal moisture, softening the collagen during the subsequent two-hour phase. Exposing the meat again for the final hour firms the exterior bark. Slicing between the individual bones requires a sharp, thin blade to preserve the outer crust.