11" Ceramic Nonstick Square Griddle

I spent a few months debating whether to purchase the griddle: I purchased it, loved it at first used it’s a total of 3times. First I made French toast. Then the other two times. I warmed up tortillas, yes, tortillas! And the griddle is now stained: How?! I followed the instructions on the care. According to the cleaning guide stains add character. Yeah no thanks! I understand if it’s after a few months wear and tear. But it’s been 3 days of having the griddle.