A drain can clog when hair, soap residue, grease, food scraps or other material builds up inside the pipe. Kitchen drains often collect grease and food debris, while bathroom drains commonly collect hair and soap residue. If several fixtures drain slowly at the same time, the issue may be farther along the drainage system. Avoid putting your hand into a drain or mixing chemical cleaners, which can create dangerous reactions. A strainer may help limit debris, but recurring blockages deserve a closer look. Note which fixtures are affected and whether the clog returns. For drain cleaning questions, call +1 (866) 569-0263, describe the affected drain and provide your ZIP code to check whether service is available at your address.