The best way to eliminate pests that have entered an operation is to use a targeted approach based on the specific pest. Identify the pest type and use appropriate measures, such as traps, baits, or biological controls, to address the infestation. For more severe cases, chemical treatments may be necessary, but these should be applied carefully to minimize risk to humans and the environment. Cleaning up food debris, addressing moisture issues, and eliminating hiding spots are also critical in eliminating pests effectively.