Ants are notorious for invading homes, mainly because they are foraging food (commonly sweets, starches, and liquids) or water sources. They can easily find entrances into homes through small gaps in your foundation, exterior walls, around doors and windows, and many other areas of your home. Once ants find a food supply in your home, they will return to collect it and bring it back to their nests. Ants can also be very problematic inside a home because of how rapidly they can reproduce and how difficult they are to control.