Burnt food residue is quite easy to clean off the Le Creuset grill pan. For a cast iron pan with enamel protection, soaking is the best way to remove the burnt mess from its surface. To weaken the burnt food build-up, put the item in warm soapy water for at least 20 minutes. If you aren't in a rush, let the grill pan soak for an extra few hours. Now, clean a pan with a sponge or a soft grill pan brush and then wash it thoroughly. Wipe a clean Le Creuset grill pan with a soft paper towel and leave it to air-dry.