The answer to 'why is my patio pests' is that your patio may be attracting common outdoor pests like ants, spiders, crickets, or other insects. This can happen if there are cracks or crevices in the patio surface, food or water sources nearby, or if the patio is located in an area with a lot of vegetation.
Some common signs of patio pests include seeing the insects themselves, finding their droppings or egg sacs, or noticing damage to the patio surface or nearby plants. To solve the problem, you'll need to identify and eliminate the pest's food and water sources, seal any entry points, and potentially use pest control methods like baits or insecticides.