On todays visit, we discussed that you have seen any activity in your upstairs kitchen and in the middle of the floor of upstairs bedroom. From what you described, it seems like the type of ant is what’s called an “odorless house ant”; one of the most common that we see in kitchens in our area. I placed ant gel bait in cracks, crevices, inside baseboard of kitchen, countertops, baseboard by fridge and then some by radiator in bedroom. I also left 2 ant bait arenas that you can place anywhere you see activity. Please allow 2 to 3 hour dry time and 10 to 14 days for treatment to reach full effect. If you would like for us to come out between automatic quarterly visits, please schedule a service call with our office. These are of no cost to you with your plan. Thank you for choosing Green Pest Solutions!