What is the correct way to handle weights when measuring ingredients on a scale?

Using tweezers to handle weights is the correct approach when measuring ingredients on a scale. This method helps to minimize the risk of contamination from skin oils, which could affect the weight being measured. Any residue from the skin can alter the mass of the weights, leading to inaccurate measurements. By utilizing tweezers, you can ensure that the weights remain clean and unaffected, which is critical for precision in measurements, especially in a pharmacy setting where accuracy is paramount.

While options suggesting using bare hands or different cleaning methods may intend to enhance accuracy, they do not effectively address the contamination issue. Wiping the scale or using a damp cloth may clean the surface but does not prevent direct contact with the weights themselves, which is essential to maintain precision in measurements.