I have used it for the fifth time now and the mess got a little worse each time

The second time I used it, I noticed there was some mess inside the silver base after. I figured some food had dripped down while serving. I have used it for the fifth time now and the mess got a little worse each time. While washing it this time I found a crack that goes all the way through the bottom. I have always hand washed, never dropped it or used it outside it's base and have never had it turned on/hot longer than 7hrs. There is no reason for it to be this way after less than six months or uses

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