If you're seeing water bugs in your home, it's likely that they're coming in from the outside. There are a few things you can do to help keep them out: 1. Make sure your doors and windows are sealed tight. Check for cracks or gaps and seal them with caulk. 2. Keep your gutters clean and free of debris. Water bugs are attracted to standing water, so if your gutters are full of leaves and other debris, they're more likely to come inside. 3. If you have a swimming pool, make sure it's well-maintained. Water bugs are attracted to still water, so a dirty or stagnant pool is more likely to bring them in. 4. Keep your yard free of standing water. If you have any puddles or other areas of standing water, either fill them in or drain them. 5. Reduce the amount of lighting around your home. Water bugs are attracted to light, so if you reduce the amount of light near your home, they're less likely to come inside.