Originally Posted by Jonathan R
Drying marks are generally on the back of the neg, which is relatively hard, and can be gently removed using a microfibre cloth over one finger, dabbed in clean tapwater.
I too have found that they are usually just on the back. A finger in a cotton glove usually removes them.
"People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.