Final answer:
The best methods to eliminate flies and roaches from an establishment are keeping the area clean, placing traps, and sealing entry points.
Step-by-step explanation:
The best method of eliminating flies and roaches from an establishment is keeping the area clean, placing traps, and sealing entry points. Regular fumigation can be effective but it should be used in conjunction with other methods. Keeping the area clean is important because it removes potential food sources for flies and roaches, making the environment less hospitable for them. Placing traps can help catch and control the population of these insects. Sealing entry points prevents them from entering the establishment in the first place.
Keeping the area clean is important because it removes potential food sources for flies and roaches, making the environment less hospitable for them. Placing traps can help catch and control the population of these insects. Sealing entry points prevents them from entering the establishment in the first place. By combining these methods, the chances of eliminating flies and roaches from an establishment are greatly increased.