Think about conducting your first services of the new year with an emphasis on ants. As the warmer months approach, ants will start to forage and increase their population nest size.
Particle baits are perfect for this scenario. Use a particle bait that is labeled for other pest insect species to cover a wider gamut. You can combine a particle bait with another insecticide application, as long as the two do not interfere with and compromise the attractiveness of the bait itself. For potential new accounts, try using this as a foundation for the year-long service contract.