<OK, I've got most of the boards out of the PDP-8/m, and some of them are <rather in need of cleaning. Anybody have any recommendations? I don't <remember what the suggestions were the last time this came up, I just <remember that my method (Pink Pearl Eraser) was recommended not to use :^) Dishwasher, bake at 160-170f until dry. All but the core plane. the core plane is fragile and the water jets would blow the mat away. The PDP-8F I have got that treatment. Vacuum the case well. Allison