Sometimes when I tone I get some slight staining on the white edge of the print - FB paper. The consensus seems to be that it isn't necessary to do a full wash between fixer and toner, and I usually only wash for 2-5 minutes in my paterson washer before toning and then do the full wash. Q. is it conceivable that with fixer becoming used, the residual silver in the used fixer is enough to cause staining if not washed out completely when toned? I really need to experiment with new/used fixer and see if this is a factor. Or maybe i should just do a full wash before I tone. Thoughts?