Using tinyfish's method, a 3/8" wrench, I can get exactly 98.3% of all crud off my grill grates. For the next cook, my grills will be heated to at least 230 degrees. Whatever gremlins were left on my grates are sizzled to a crispy goodness that even the most refined pallet couldn't taste. Satan himself, or in the case of some ex-wives, herself, doesn't clean their grills spotless after each use. Don't ask how I know.