Hi, We keep ours on by using egg albumin (from American Master Tech). Brush some on the slide, let it air dry then pick up your sections. It will hold through PASD as well as H&E. Good luck! Erin PS A 1:4 Nair solution softens the block up nicely after you face it in. Erin Martin, Histology Supervisor UCSF Department of Dermatopathology 415-353-7248