I read a study done by LE with the use of gloves that crime scene investigators use. they wanted to see if they would contaminate a crime scene. From what i can remember about this study is that after an hour or two of work, the sweat made it so the fingerprints of the investigators contaminated the crime scene. something to do with the moisture. They advised to use wear 2 sets of gloves. OR used a cotton glove with a laytex glove over that. Personally, using 2 sets of laytex gloves should do the trick.