[Histonet] warthin starry

I have put this question out once before and I didn't get much for a response so I thought I would try putting it out there one more time. I have an ongoing problem with my Warthin-Starry stain. The peripheral edges of some of the gastric biopsies are not staining. I am also experiencing this same non-staining with the Steiner stain on the Ventana stainer. I have tried reducing the temp on the processor down from 60c to 58c thinking they might be "cooking" on the processor (the H&E's look fine) as well as checking the ph of my solutions. This did not work. Could this be a handling problem prior to fixation in 10% NBF? I am at my wits end. Any suggestions will be greatly appreciated.