You are contaminating the developer for sure, I have been using Ilford WT since its launch , in fact I was a beta tester of the product. . I have never seen a bad batch of paper from Ilford. Not that that says it all but reading your posts , you have so many variables I think there is other things happening.

Quote Originally Posted by schrochem View Post
One last stab in the dark here. I'm not sure but snatching happens fast and I'm sure my tongs get in the stop. Bringing that residual acid into the developer isn't good for the alkalinity but could that cause these problems?
I'm wondering if it's what is killing the arista lith. Compared to other formulations it doesn't have glycol which might help buffer the solution?