Today at work (I work in as a Kitchen Assistant) part of my job is to clean the oven. As I was cleaning it my work colleague came and told me that I was cleaning it too early and she had food still in the oven. I apologised and thought nothing more of it. But 10 minutes later she came over to me in-front of the boss and said to me "Why did you switch off the oven?". I told her I didn't switch off the oven and she walked away looking really pxxxxd off. Later on another work colleague came to me and told me that the Boss told her that even though she knows I would not switch off the oven intentionally it may have been done by accident without me realising it. The Boss then said to her that I know you always stick up for xxxx but she probably didn't realise it got switched off. I then went back to my work colleague and apologised (in-front of the Boss) for what happened to the oven. I told her I didn't intentionally switch the oven off but I may have accidentally while I was cleaning the top of the oven pushed the button off. I also told her that if I did realise that I switched off the oven I would have put the oven back on. She then told me that even if that did happen there is no way the oven would of switched itself off. I told her that I didn't want to stand and argue with her over the oven and she told me to forget about it. Was I wrong to confront her again or should I have just kept quiet. My husband thinks I shouldn't have gone back to apologise to her as I told her already I didn't switch off the oven. My other work colleague said it has made me look like the bigger better person as I did this in-front of my Boss.