Fingerprint quality is determined by many factors, some of which are beyond our control, but others which we can greatly influence before being fingerprinted.
If you’ve encountered issues with your fingerprint quality, you may want to give some of these tips a try prior to your next attempt:
1.) Drink lots of water starting the day prior to your fingerprinting appointment and minimize caffeine and alcohol.
2.) Apply oil-free moisturizing lotion to your hands a couple of times the day prior to the appointment and again the morning of the appointment; especially each time after you wash your hands.
3.) Do not swim or have your hands in water (especially salt water) prior to the fingerprinting appointment.
4.) Do not wash your hands or use hand sanitizer immediately prior to your fingerprinting appointment.
5.) Cool your hands before coming in for your fingerprinting appointment, especially on hot humid days.
Reference and for more information: