If your brother used the oven to bake a circuit board, it's not safe to use the oven for baking food afterward without proper cleaning and precautions. Baking a circuit board can release potentially harmful fumes and contaminants into the oven, which can be dangerous if ingested or inhaled.
Here are the steps you should take if your oven was used to bake a circuit board:
Ventilation: Ensure that the kitchen is well-ventilated by opening windows and turning on exhaust fans. Allow fresh air to circulate to help disperse any lingering fumes.
Cleaning: Thoroughly clean the oven to remove any residue from the circuit board. Use a suitable cleaning agent and follow the oven manufacturer's guidelines for cleaning.
Run a Cleaning Cycle: Many ovens have a self-cleaning feature that heats the oven to high temperatures to burn off any remaining residues. Running a cleaning cycle can help eliminate any potentially harmful particles.
Inspect for Damage: Inspect the oven interior for any visible signs of damage. Look for melted or damaged parts that might affect the oven's performance.
Baking Sheets or Aluminum Foil: To add an extra layer of protection, consider using baking sheets or aluminum foil when baking food in the oven. This will help prevent direct contact between the food and the oven surface.
Test Run: Before baking any food, perform a test run by heating the oven to a high temperature (around 200°C or 390°F) for 20-30 minutes while checking for any unusual odors or signs of fumes. If you notice anything unusual, avoid using the oven until it has been checked by a professional.
If you're unsure about the safety of using the oven after it was used to bake a circuit board, it's best to consult with a professional appliance repair service or the oven manufacturer. They can inspect the oven, assess any potential risks, and provide guidance on whether it's safe to use the oven for baking food again. Safety should always be a top priority when using household appliances, especially when there's a chance of contamination from non-food items like circuit boards.