This thing rocks! Wow, this oven is amazing! I cleaned it with vinegar, as unstructured, and immediately baked two loaves of wheat bread in it. Baking time was about 45 minutes. They came out perfectly! The solar oven temperature reached 325 and stayed there consistently for about 4 hours. I went outside every 30 minutes to realign. No biggy. Very easy to do. There was condensation on the inside of the glass during baking, but this didn’t affect the bread or temperature at all. Very happy with the quality of this product. Made to last and it works. Perfect for emergencies or just keeping the house cool while letting the sun do the work!