I have a gas barbecue that needs a thorough cleaning before our family gathering this weekend. The grill has accumulated grease and food residue from several uses, and I want it to be spotless and ready for cooking. Ideally, the cleaning should include scrubbing the grates, cleaning the burners, and wiping down the exterior. I prefer someone experienced with barbecue maintenance who can do a detailed job. Please bring your own cleaning supplies if possible.