Medical implant devices are prepared from a polymeric material and a release agent, where the device is a molded, reservoir implant, and the release agent has a molecular weight (MW) of at least 1000. The release agent may be a non-ionic surfactant such as Brij 35, polyoxyetheylene(20)sorbitan trioleate, Tween 20, Tween 80, vitamin E TPGS, and a mixture of any two or more thereof. Hydrated implants may have a surface area of about 500 mm2 or greater.