Kitchen Aid Countertop Oven Model KC0111CU releasing an overpowering smell of burning plastic?

We just bought this oven from Macy's a week ago and have used it once. We are afraid of usung it again, because the first time, we broiled fish for less than half an hour and within five minutes of turning on the countertop oven, the entire kitchen smelled as if there was burning plastic. This strong smell did not go away until the next evening. Also, the area around the countertop oven was looking a bit smoky--you couldn't clearly see smoke floating, but it definitely was not a clear environment. Has anyone experienced the same problem with this model? I'm thinking of returning it because I am so afraid to turn it on--I cannot smell the same thing from last week, it smelled absolutely poisonous! I appreciate all the feedback.