To regenerate your fingers' natural oils, rub your fingertips together or against the palm of your hand, the side of your nose, or your forehead. Wet Prints Excessive moisture in the skin can cause your fingerprint features to blend together, resulting in inferior model constructs or inconsistent identification. Excessive moisture is generally caused by sweating or by handling wet materials or substances. Common sources are greasy foods, hand lotion and makeup. The condition is easily solved by removing the excess moisture.
Scar tissue has plastic-like qualities.
Due to occupational hazards, some fingerprints cannot be imaged. Heavy labor such as mining or farming, and other occupations can cause excessive fingerprint hardening, scarring or wearing, rendering the prints unusable for fingerprint applications. In these cases, some portion of the finger, such as the heel of the palm or side of the finger, can still reliably analyzed using BIO-key technology.