Kitchen trash cans can easily become overpowering in the aroma category because they tend to get the majority of trash that will surely rot. Most of my favorite dishes contain at least one ingredient that once it spoils, will make my eyes water. You can sanitize or spray deodorizer in the trash can every day or you can simply attach a dryer sheet to the inside of the trash can lid. I use double-sided tape and spread out one dryer sheet across the lid and drop another in the can between bag changes. Dryer sheets are fairly inexpensive and can usually last through a few bag changes.