Nuwave Oven

I have owned this oven for more than 5 years but I do not use it much. It does cook the food from thawed to cooked but the problem I have with it is that all the food to me has a metallic or funny taste to it. Not sure how to describe it. I still have it and I pull it out every now and then and give it another try but still the same result. I guess I keep trying it because I own it but have not used it in 3 or 4 months. Maybe I will pull it out and try cooking something new in it and see about the taste of that. If I could go back in time would I buy this again? Probably not.  I am willing to keep trying new ideas if anyone who owns this machine and loves it can let me know how to get that funny taste to go away I would be willing to hear about it please. Mine is in white.

Can be bought in many stores now a days.