There are 4 possible ways of smell in the kitchen, which are;
1. The smell in your kitchen is likely coming from the garbage disposal.
2. A buildup of food down where the water meets action can give off an unpleasant smell.
3. If you're cooking fish, the smell will likely stay in your kitchen for a few hours.
4. One possibility for a bad smell in the kitchen is that you have a dead animal in one of your walls.