I am a highly skilled and experienced home service professional. I recently completed a job for a client who had a clogged drain. I returned to their apartment the next day to re-run the drain and found that the blockage was caused by a buildup of grease and hair. I used a powerful drain cleaner to clear the drain, and the client was very satisfied with the results. I also provided them with some tips on how to prevent future blockages, such as regularly cleaning their drains and using drain screens. Overall, it was a successful job, and the client was very happy with the results.