why do fingerprints cause smudges on surfaces such as glass?

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why do fingerprints cause smudges on surfaces such as glass?

In: Biology

6 Answers

Anonymous 0 Comments

Our skin carries oils and gunk through exposure or contact with the environment.

This is especially true for our nose as well as our fingertips. The smudges are leftover residue from water, soap, food, etc hidden in the grooves of your fingertips like trenches.

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