3 weeks ago I mixed up 1 litre Ilford working solution of Selenium toner @ 1:5 when I started experimenting with Lith. I have pulled half a dozen prints onto mainly Slavich paper. The toner initially rapidly changed the colour of the print going fairly quickly to red/brown, but now seems to stall at almost no change/slightly dark brown. I have washed the prints for a short period before toning but there is a good chance of a little fixer carry over. Toner solution is still clear with no deposits and has been bottled for storage between sessions. What do I do now? Is the toner exhausted? - I would have thought capacity was more than this. Shall I start again with fresh mix or add some concentrate to this working solution as I saw someone suggesting somewhere? As an aside, I experimented last night pulling a lith print from a colour 35mm neg, using the same (nearly 3 week old) working developer I started with, and it still seems just as active as day 1, and is still only the slightest of yellows in colour. I think I will make up a new mix next time, though!