Can I use old aluminum foil for baking?

Using old aluminum foil for baking is not recommended. Over time, aluminum foil can develop pinholes, become discolored, or tear, which can lead to uneven heating and potential contamination of the food. Additionally, old foil may release aluminum particles into the food, which could be harmful. It's best to use new, clean aluminum foil for each baking session to ensure food safety and quality.