To clean under fingernails, which tool is most effective?

The flat end of an orangewood stick is the most effective tool for cleaning under fingernails due to its design and purpose. The narrow and pointed shape of the stick allows for precise access to the space under the nails, enabling the removal of dirt and debris effectively without causing damage to the nail or the surrounding skin. This tool is specifically designed for manicuring purposes, making it a practical choice for cleaning under fingernails.

Other tools, like an emery board, are primarily used for filing and shaping nails and do not provide the necessary access or effectiveness for cleaning underneath. A washcloth, while useful for general cleaning, lacks the targeted approach needed to reach underneath the nails. Similarly, a cotton ball is typically used for applying or removing products, such as nail polish, but it does not have the structure necessary for effectively cleaning under the nails. Thus, the flat end of an orangewood stick stands out as the best option for this specific task.