Why is it not advisable to use sandpaper or steel wool in cleaning the inside of aluminum pots and pans?

Sandpaper and steel wool are not recommended for cleaning the inside of aluminum pots and pans because they can cause damage to the metal.

Aluminum is a soft metal, and using abrasive materials like sandpaper or steel wool can scratch and damage the surface of the pots and pans. This can make them look dull and worn, and it can also make them more susceptible to corrosion and staining.

In addition, sandpaper and steel wool can leave behind tiny metal particles that can contaminate food. These particles can be harmful if ingested, and they can also give food a metallic taste.

For these reasons, it is best to avoid using sandpaper or steel wool to clean aluminum pots and pans. Instead, use a soft sponge or cloth with a mild detergent. If you need to remove stubborn stains, you can use a non-abrasive cleaner, such as baking soda or vinegar.