While cockroaches dislike certain smells, it's important to note that they might not be completely effective in keeping them away on their own. Some scents that may repel roaches to some extent include citrus (such as lemon or orange), peppermint, eucalyptus, lavender, and cedar. However, these scents alone may not eliminate a cockroach infestation. Combining scent deterrents with other pest control methods is crucial for effective results.