Not cleaning your hands good enough is always a problem. I personally use tongs and keep my fingers out of the soup. I use three different tongs, one for developer only, stop only, and fix only. On prints larger than 8x10 I use gloves to handle paper in the chems, and remove them to handle clean paper. I keep a box of vinyl food handling gloves on stock for that. Exposing your skin to chems could lead to dermatitis, and constant washing leaves mine chapped, especially in winter.