Does rain get rid of fingerprints?
Herein, does water get rid of fingerprints?
Latent Fingerprints on Wet Surfaces. In most cases criminals are concerned about not leaving any traces at the crime scene. Therefore, it is common to burn exhibits or throw them into water (e.g. plastics, bottles, foils etc) with the intention to wash all fingerprints away.
Beside this, can fingerprints wash off in the rain?
Sweat consists mainly of water (98% - 99.5%). If the weather had been inclement, I would expect the mark to be “washed away” due to the effects of the rain and, therefore, the mark would appear faint on the lift. The sweat from the fingerprint is mainly made up of water and would evaporate and fade in the sun.
Fingerprints have been developed on porous surfaces (papers, etc.) forty years and later after their deposition. On non-porous surfaces, they can also last a very long time. The nature of the matrix of the latent print will often determine whether it will survive environmental conditions.