I just purchased a house (1950s) a few months ago. Since I moved in, there has been a smell coming from the kitchen sink. I am not sure I can appropriately describe the smell, other than perhaps old food. Here are some details and tricks I've tried to get the smell to go away.
The house is on city water/sewer.
The sink drains perfectly. Water does not stand at all and free flows quickly out of the basin.
The smell is there even when the sink is empty of dishes and clean.
The smell is not there 100% of the time...even if there are dishes in the sink or the sink is empty and clean.
I've poured the following down the drain (not at the same time):
bleach (filled up the sink with water, then added a cup of bleach, then drained)
vinegar and baking soda
If you have any thoughts about what I could do to fix this, please share. Thank you.