Drain Clogs Hair, soap scum, and mineral buildup are among the most common culprits of shower drain clogs. Hair can accumulate quickly and easily in the drain, especially if you have long hair or live with someone who does. Soap scum can also build up over time, causing a blockage in the drain. Mineral buildup can be especially problematic in areas with hard water, as the minerals can accumulate and solidify in the pipes. Read more from the blog.