Since you don't eat the peel, washing bananas is not necessary. However, it's advisable to wash your hands before peeling and eating to prevent transferring any potential contaminants.
The outer peel of citrus fruits is not commonly consumed, and the fruit inside is usually protected from contaminants. However, it's a good practice to wash the fruit before slicing or juicing to prevent any surface bacteria from transferring to the edible parts.
In many countries, eggs are washed and sanitized before reaching the consumer. In such cases, additional washing may not be necessary and can even remove the protective coating on the eggshell.
Cheeses with a hard rind, like Parmesan or Gouda, typically do not require washing. The outer layer serves as a protective barrier, and washing may alter the flavor and texture. Simply cut away any visibly contaminated parts before consumption.
Honey has natural preservative properties that make it inhospitable for bacteria. It doesn't need washing, and in fact, doing so may alter its texture and flavor.
If you're using canned fruits, vegetables, or other items, the contents inside the sealed can are generally safe to consume without washing. However, always check for any damage to the can before use.
Packaged bread is generally safe to eat without washing. However, it's essential to follow proper storage guidelines to prevent mold growth.
Leftover cooked foods stored in the refrigerator or freezer are typically safe to eat without washing. However, reheating thoroughly is crucial to kill any potential bacteria.