I purchased a MWG9115SB microwave and oven grill yesterday 10/24/2014. Before I even use it am I going to encounter these types of problems? While cleaning microwave noticed under the turntable was peeling paint and showing rust. I bought this 7 months ago and sensory buttons say defrost will not let me turn on. Bought this in December last year. The sensory buttons don't work right for the last two months.