When you stop and think about all the stuff that goes into your kitchen sink... you tend to wonder, what IS left behind?
In a recent poll 50% of people admitted to leaving dishes in the sink for 24 hours. But 43% said a week! That's a lot of time to build up bacteria.
Oh, and I clean out my fish tank in the kitchen sink. So...let that sink in.
I use a super harsh bleach cleaner now... but you don't need to go that severe.
Here's a great article from Real Simple on how to clean your sink, faucet, and disposal easily and without harsh chemicals. Think vinegar, lemons, and a good brush.