Most health departments accept a contact with a solution of 1 cup chlorine bleach to 5 gallons of water. Contact must be maintained for 10 minutes, and repeated contact could cause the surface of the disc to become pitted. I would recommend using one of the new air-drying iodophor sanitizers. Contact time is less than five minutes and no rinsing is required, thus less chance of corrupting data with tap water. Oh ... this isn't the Homebrew digest? Then where did I send that message about increasing throughput on the DTC? Bill (on Friday) -- Bill Sutton ([log in to unmask]) ++ Caveat Lector WTEC - Networks TN 795-5612 ++ ++ These opinions are not those of HP