I just can’t get this thing clean

I bought it at Costco recently - it’s a Gourmia. It’s so hard to clean. I also don’t have a dishwasher. I let it soak overnight in dawn and hot water and the grease is still so hard to get off unless I scrub and scrub a million times. So frustrating. Any tips?

I bought it at Costco recently - it’s a Gourmia. It’s so hard to clean. I also don’t have a dishwasher. I let it soak overnight in dawn and hot water and the grease is still so hard to get off unless I scrub and scrub a million times. So frustrating. Any tips?