Step 2 – Identifying the Mold. The sink and sink drain actually smell fine - it's the cabinet underneath it. Start Simple, Use Boiling Water. Those three things should eliminate any strange smells.-Oh, and one other thing. There are different types of molds. Mildew grows in dark, dank places, and sink pipes provide an ideal habitat for mildew spores to spread. Water valve is shut off for now.However, I now smell it stronger from the double sink … And over time, bacteria will cause it to decay and smell. This is the hole near the top of your sink. Kitchen Sink Smells Musty Jacquelyne Notis July 11, 2018 Get rid of stinky kitchen sink smells remove mildew smell from a kitchen mildew smell under a sink dishwasher how to clean a stinky sink drain by Required fields are marked *. Let it sit for 15 or 20 minutes and repeat. //