The answer to 'how to prevent ant' is to use a combination of prevention methods and targeted treatment. Start by eliminating any sources of food, water, and shelter that may be attracting ants to your home. Seal up cracks and crevices where ants can enter, and keep your kitchen and other food preparation areas clean and free of crumbs or spills. You can also use baits, sprays, or granules containing insecticides to target ant colonies around your home. Be sure to follow the product instructions carefully and take safety precautions when applying any pesticides.
If you continue to have issues with persistent ant infestations, it's best to call in a professional pest control technician. They have access to more powerful products and can provide a comprehensive treatment plan to eliminate the ants and prevent them from returning.