Cleared clog via roof access. Performed camera inspection and saw what appeared to be the plastic covering to a tampon, feminine products should not be flushed down drains. The old cast iron also had build up which is also attributing to the frequent clogs. Recommended installation of cleanout in back yard in order to allow for access for descaling and cleaning of sewer main in attempt to prevent future clogs. Also notched that the finish on bathtub is peeling off and getting stuck in the shower drain causing it to drain slowly. Recommend having tub cleaned to remove sections of finish that are coming off. Cusuomer will continue to have clogs until these issues are addressed