Hi, folks. I've just gotten started doing printing and am feeling my way about the darkroom. I just did a long printing session last night and I KNOW the pitiful one liter of chemistry per chemical (for 11x14" trays) was not nearly enough to get good results, and they were dying on me fast. When I stopped, nearly all the chemicals were an orange color. Yeah, that made me wince. And some of my last printing efforts are tainted by yellowed edges. The purpose of this post is not for you guys to beat me up over using exhausted chemistry, but because I'm curious about something. The guy who sold me my enlarger threw in a drying rack he had built , and he sandwiched his prints between large metal window screens for drying. I dried my work (some FB, some RC) face down between those same screens, and several of my prints --all of them 11x14 -- had small (1/4" around) chemical splotches on them in random places, and they had bits of white crosshatching in random places, obviously caused from contact with the screen. I'm wondering if these white artifacts are from improper fixing, hypo-clearing, or washing. If so, when I start using fresh chemistry in more generous amounts, will I still have to worry about the screens imparting patterns on my prints? Any other general tips would be appreciated - like I said, I'm just starting with printing and I'm loving it. I just hope to get spotless results. Thanks!