I have had this microwave for about 2 years. I have always wiped it out with each use. This rust started showing up and I didnt know at first what it was. Now the entire oven has rusted out and I will have to purchase a new one. I bought it brand new from Walmart. They said to tell you. It is a crying shame for it not to last longer. Sharon Holton. 116 SE Forrest Lane. Chapel Hill, Tn 37034 User's recommendation: Don’t buy it.