Cleaning and maintaining a cooling rack is relatively easy, as most are dishwasher safe or can be simply rinsed and dried. Some may choose to line their racks with parchment paper, especially when cooling sticky or delicate items, which aids in easy removal and cleaning.
That’s how grilling over charcoal gives you that wonderful flavor. The briquettes themselves are just middlemen, not the flavor-makers. The more you drip, the more the flavor builds.