Hi there everybody! I purchased a master touch about a month ago. I have had only three cooks since. My first was ribeye and chicken legs, second was a very thick ribeye, and it was very easy to clean the grill with my Weber steel brush. My third cook however was a different story. I made marinated kebabs, beef kebabs, and the central removable grill portion on my grill had this encrusted black hard gunk that wouldn't come off even with post cooking heating and brushing. Soaked it overnight in a soap solution. Didn't budge. I had to physically take my steel brush to this thing and spent 15 minutes cleaning it off. What did I do wrong? How can I prevent this from ever, ever happening again? Thanks in advance, Weberites!