I've never cooked burgers raised direct, something to try. I let my CI grate heat up at 400 for at least 30 min then open it up and get the temp 500-525. Put the burgers on for 1 min, flip 1 min, flip opposite direction (grill marks on the 1st side), flip again. When I flip my final time I shut down the egg and apply the cheese. Delicious every time!