You’re not likely to find water bugs in your house. They may accidentally come in an open door when flying, especially since they are attracted to lights. But water bugs tend to stay stationary in bodies of water. You’re much more likely to see a roach in your home, not a water bug.

Aside from a warm, cozy place to curl up, you might wonder what attracts mice to your home. Several items attract mice, including: Birdseed Pet food Water Cereal and whole grains Food scraps from the composting bin Open trash cans High-fat and high-sugar foods Unused cars—they make great homes for chilly mice Insulation in the attic Clutter Brush from your yard, including leaves, sticks, wood, and shrubs (so mice can make nests) Overgrown trees or bushes—mice love to leap from branches onto the roof Indoor nesting materials, including cloth, paper, tissues, and toilet paper Tiny cracks in the siding or foundation

Both spikes and loose nets can be installed over nest sites to prevent the bird from returning, but nets are not a humane option since birds and other wildlife can get tangled in them. 

Spikes are a humane alternative that deter nesting without harming the birds. In small areas, like vents, a very fine mesh net can be installed to prevent the bird from returning. These nets don't generally pose a risk to the birds.

You should not squish a roach because it can spread disease, attract more roaches, and release allergens. Roaches feed on the bodies of dead roaches, making more of them come. Squashing an individual roach only kills that one, whereas boric acid powder or baking soda can kill an entire population because it travels back to the nest before dying.