To effectively control cockroaches, mice, flies, and other pests in an establishment, it is important to follow good practices. However, the question asks for the option that is NOT a good practice. Here is a potential answer:
Using pesticides without proper training or following safety guidelines is NOT a good practice for controlling pests in your establishment. Improper use of pesticides can pose health risks to humans and may lead to environmental contamination. It is crucial to have trained professionals handle pesticides, following all safety precautions, and ensuring that they are used in a targeted and responsible manner.