I use a lab grade detergent from Fisher Scientific: VersaClean. It is specially formulated for plastics, and is ultra-sound compatible. Plus distilled water.
Scientific supply houses have to provide the real goods - audiophile not so much. Hence Fisher. Oh, and new sleeves are a good idea too, as ghost suggests.
Scientific supply houses have to provide the real goods - audiophile not so much. Hence Fisher. Oh, and new sleeves are a good idea too, as ghost suggests.