Abstract: This invention relates to a method and device for maintaining an optimum dampness level in preconditioned cleaning cloths for extended periods of time while still enabling repetitive retrieval and use of individual cloths. The device described herein maintains an environment where the temperature and humidity of the vapor surrounding the cloths are stored to a preset level, thereby minimizing moisture change. The invention is applicable to any cleaning operation requiring repetitive small-batch operations over an extended period of time, but is especially useful for such operations such as window cleaning in commercial car washes and food service establishments.