In the past, I would test for residual hypo on a reject print that I would toss out after testing. Today, I tested a keeper print. I squeegeed the surface dry and placed a drop in one corner, waited two minutes and blotted off the solution. I got no stain so I thought everything is fine. Now the print is dry and there's a faint tan stain where the solution was placed. My procedure is to use a two rapid fixer bath for 30 seconds each, holding tray with a weak solution of a washing aid, rinse in a large tray for a few minutes, HCA for ten minutes with regular agitation and shuffling of prints and 60 minutes in a Versalab washer. Now I'm worried that I'm not washing enough. Any suggestions?