I have a long piece of nylon that I strung clothespins separated by figure eight knots. I tied a loop at one end and pass the nylon through the loop and attach it to the shower head. I string out the nylon and clothespins and attach it to the shower stall or shower cloth, depending where I am. I hang the negatives with the clothespins and let the film dry. Cost effective and I have never had a problem with dust or dirt.