If after two baking soda/vinegar treatments your drain still drains slowly, the problem is mechanical or chemical—not biological. Invest in a $10 drain snake (auger) or call a plumber.
The rapid production of carbon dioxide creates fizzing and bubbling action. This physical agitation can: baking soda sink drain
If your drain isn't clogged but smells bad or runs a little slow, this method is a gentle abrasive scrub. If after two baking soda/vinegar treatments your drain
Follow these steps for regular maintenance or to clear a slow-draining sink: baking soda sink drain