As an OVENU franchise owner, my duty is to take apart the oven, remove any oven trays, liners and glass, and place them into a heated dip tank located in the back of my van. I then manually scrub the inside of the oven with caustic-free products to restore it back to its former gleam. Once this is done, I remove the items from within the dip tank and piece the oven back together.The entire process is completely safe for the oven, something that not many oven cleaners can offer, and usually takes between 2 and 4 hours.