Bests & Worsts Reviews from Amazon

I bought this to roast coffee about 2 months ago to stir green coffee while roasting it. I was very happy with it on the first time, roasting with it. On the second roast, the bottom part slightly changed its color. On the third roast, the bottom part completely melted , separating from the main part of the stirring handle. Coffee roasting is specifically given as example for this product, and I am measuring the temperature of my coffee during roasting, it was 242C (515F) when it melted, well below the 570F in the spec. You can see in the attached pictures the burned/melted part (as well as the rest which works fine). The burnt down part on the picture used to be connected to the white stick, it is the part that actually stirs the coffee on the bottom of the pot, and touches the pot and the coffee. The coffee is @515F/240C and it should have been OK. Had this happened in the first use, rather than the third, I would have returned it. This happened after the return window, but on my third roasting .... I'm very disappointed, not recomended.