I have ants in bathroom and kitchen. This is on and off problem. I really don't know where they are hiding and how they got into the drain vent of the dishwasher. I think I have pharaoh ants because spraying is simply not working. I think I will need to set baits. But all the baits I set before are not attracting ants, most of the baits looked unused. I could hire an exterminator. I think the price is reasonable but I don't know if it is the real solution. Do exterminators have better baits?