So sorry to hear this was not effective for your clog. After one application (or two for tougher clogs), we expect Drano® to eliminate clogs caused by hair, grease or gunk. To best assist, visit us at Drano.com and click contact us at the bottom to email us. Or, give us a call at 800-558-5252 Monday through Friday from 8 AM to 4 PM CT. Your reference number is 019957185A. – Brooklyn, SC Johnson Consumer Care