I've had (and used) my crockpot for about 12 years now. I have noticed a few hairline cracks popping up along the inside over the past year or so. The last time I used it I realized that there is now a hairline crack along the bottom of the stoneware as well. Is it time to put it away? I would probably get a new one before replacing the part, but don't want to throw it away if it's not quite time yet. Thoughts??