Bests & Worsts Reviews from Amazon

I was happy with the product the first two or three times I used it. I hand washed it and oiled it thoroughly each time immediately afterwards. However, today I used it to grind corn into Mexican masa, like before, and after I was a good way into it I began to notice the color changing. The first picture is the masa from inside, which had metal rubbed into it. The second picture is the source of the problem, the metal piece which has been rubbed and exposed below the tin coat by the design of the piece shown in the third picture. The iron waste had spread throughout the entire inside of the mill. If it wasn't for this problem, this would be a fine product with a very fair price. But after what happened today, my meal and my molino are ruined. My use was limited to what was advertised on the box and I took a lot of care in using it and assembling it. Other customers seem to experience rust problems. This can be avoided by throughly drying it and then applying oil to every surface. My problem is different and I hope it reflects a one time production problem. I'm contacting customer service to figure out a return or refund solution and may order a new one with the hope it doesn't have the problem this one did.