oil+oven=smoke

This evening I was going to bake cookies. Key word there is was. So in usual fashion I began mixing the dough and remembered I needed to get the oven preheating. So I I turned it on. I feel I should mention I have a gas stove at this point. As I continued mixing the dough I felt like my eyes were getting a little foggy, I atributed this to the fact I have recently felt my eyes were not seeing as clear as they should (worry not, I have an appt scheduled with my eye doctor). As I looked more I realized it was smoke, from the oven. And then I remembered last time I used my oven it did the same thing because oil got on the bottom and forgot to clean it at the time. And so with smoke detectors going off, all of them in my house are connected, I opened the door, turned on the vent, and started the ionizer. Needless to say my cookie baking turned into oven cleaning. So no cookies, but a much cleaner less smokey oven.