I use one of those little knives that you see for $1.00 at the hardware store checkout. I've used the same one for 20 + years. Linda Blazek, HT (ASCP) Department of Pathology Children's Medical Center 1 Children's Plaza Dayton, Ohio 45404 (937) 641-3358 fax (937)641-5482 blazekl <@t> childrensdayton.org