The first time to preheat the 150 degrees, ten to fifteen minutes on ok, the door must be open, full open half open actually does not matter so that the heating tube on the protection of paraffin oil fully evaporated, and will produce a lot of smoke, open the door of the oven to facilitate the emission of smoke.

The process of baking something can be opened, and we will often open in the process of baking, such as pizza and muffin cake making process will be opened twice, dangerous words. It's just using the pickup clips to pick things up, don't use your hands or insulated gloves or else.... And just a reminder, don't touch the top surface of the oven during baking, that area is hot too!