Customers kitchen sink and washer machine where both backing up when water was draining. Removed washer machine and snaked drain via cleanout and was able to clear clog. Ran water for several minutes and everything was draining properly. Followed with camera inspection and saw that drain line had a low spot that was accumulating grease and solids. Flushed out grease as best as possible. If tenant continues to have issues recommend performing hydrojetting to remove grease.