My sims can't cook on the stove in the sims 3?

I have sims 3 for the pc. Last night, when I went to end the game it said like error: not saved or something like that. While I was saving it one of the sims was cooking on the stove. I saved it again and everything seems to work fine except the stove. Even if no one is using it, it says in use by (my sims name). If I try to delete it or move it, it also says the same thing. If I try to move when I move back in it still the same. Does anyone know a cheat or a way to reset the stove so I can delete it or something?