Every effort possible should be taken to ensure that the best fingerprint impressions are taken. The first step is to prepare the individual?s hands before taking impressions. SEARCH? Cleanum? Prep Towelettes are formulated to condition the skin and ridges by eliminating excess moisture from the skin and by softening hard, calloused and dry fingers. Good hand and finger preparation will result in better print reproduction. Each Cleanum? Prep Towelette is hermetically sealed.