What started as a minor inconvenience has slowly turned into a more noticeable issue. I first noticed a faint smell coming from the bathroom drain, but I assumed it was just buildup and cleaned it thoroughly. However, the smell keeps returning, and now the water is also draining slower than before. I’ve tried multiple cleaning methods, but nothing seems to solve it permanently. Could this indicate something deeper in the plumbing system, and how would you typically confirm that?