Bad Smell From Under Kitchen Sink. Not all stinky sinks are food-related though. There are 2 common kitchen sink smells well cover here.
An odor under the sink could be from spills or items stored in the cabinet. The water is draining slowly or not at all. Very familiar with the sewer gas smell in the kitchen cabinet under the sink.
If the water is draining slowly or not at all then debris could be clogging the pipe and causing the smell.
It is possible to treat your water and distribution system to prevent this from happening in the future. Baking soda vinegar and boiling water The most popular trick among Kitchn readers for getting rid of sink drain smells. Mould loves the moist environment in your drain. Think about all of the food debris and grease you put down there on a weekly basis.
