How do I eliminate odors from my bathroom sink?

Odors from bathroom sinks are usually caused by buildup in the drain or a dry trap that is no longer blocking sewer gas. First, we check that the P-trap contains water and is not leaking. If the trap is dry, running water for a few minutes may be enough to resolve the issue. If that does not solve the problem, the odor may be coming from biofilm inside the drainpipe. In that case, we perform a thorough cleaning using specialized tools and disinfectants designed to remove organic material and bacteria. In more persistent cases, we may disassemble the trap and clean it manually or flush the line with an enzymatic cleaner that breaks down buildup over time. We also check that your venting system is functioning properly since poor air flow can draw unpleasant smells back into your bathroom. Once cleaned and properly maintained, odors should not return.