Dear Fellow Histonetters,
    We are currently experiencing problems with our PAS/DPAS stain,  We
have replaced the Schiff reagent. And have tried different controls.  I
would greatly appreciate any advice on what tissues you use as controls
and methods of staining.  This is a recent problem that leads us to
believe it is either a contaminated reagent or bad control.  Any input
is welcome.   Thanks Donna