Thanks for reaching out, Susan. We're sorry to hear you're dealing with a clog. Drano® is designed to work great to power through buildup in your drains. If the clog is too far down Drano® may not be able to reach, and we'd suggest contacting a plumber. We'd like to hear more about your experience to best assist you. So we can, give us a call weekdays from 8 a.m. to 5 p.m. CT at 1-800-558-5252 and provide this reference number: 22790364. We'd love to chat with you! – Mindi, SC Johnson Consumer Care