My regular exercise before I put negative in a negative carrier for enlarging. - Wear gloves. - Carry the camel hair brush in the pocket. - Take negatives carefully from sleeves. - Bursh it gently on both sides. - Put it in a negative carrier. - Print. Occasional problems: Tiny strand(2-3mm in length << 1mm of width) which are invisible to eyes got magnified on the prints. Sometimes right on the face which is very distracting esp., when I try to show the prints to my wife. May I know how to get rid of those strand?