The answer to 'why is my toilet slow draining' is that there is likely a clog or obstruction in the toilet's drainage system. Common causes include accumulated debris, mineral buildup, or a problem with the toilet's plumbing. Slow drainage can also be a sign of a more serious issue like a problem with the main sewer line.
Symptoms of a slow-draining toilet include water taking longer than normal to empty from the bowl, gurgling sounds, or the toilet bowl not fully flushing. In some cases, the toilet may even back up and overflow.