We have a fan assisted oven which when cooking makes the kitchen smokey. My daughter says her eyes sting. The oven is not self cleaning and I have cleaned it but maybe not very well. I have heard that self cleaning ovens clean themselves by burning off the fat. If this is the case surely they will make the kitchen smokey as well. I am wondering if we need to fit some kind of extraction. The oven is a double built-in Delonghi in stainless steel. Any advice welcome.