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To kill fruit flies outdoors, you'll want to make a homemade insecticide or find a plant-safe, nontoxic product. Fill a garden sprayer with your chosen solution and apply it on your plants and around the base of your home's exterior. Take care to limit your exposure to insecticides, as they can irritate skin and eyes. Always rinse garden fruits and vegetables before eating them.

Roaches have a strong sense of smell and are repelled by a variety of potent aromas. Scents that can help deter them include citrus (such as lemon and orange), herbs like peppermint, mint, basil, thyme, and oregano, spices like bay leaves, cinnamon, clove, and garlic, as well as lavender, eucalyptus, citronella, tea tree oil, and vinegar.

You can use these scents in several ways to create an unwelcoming environment for roaches:

• Plants: Place mint or lavender plants in your home or garden.

• Powders and Leaves: Sprinkle garlic powder or place crushed bay leaves and citrus peels in high-risk areas like kitchens, bathrooms, and entry points.

• Sprays: Create a diluted solution with scents like lemon or vinegar to spray in your home. These can also be used in cleaning products or as room fresheners.

• Essential Oils: While essential oils of these scents can be used, be cautious as they can be toxic to pets if inhaled.

It is important to note that while these smells can help keep roaches away, they typically do not kill them and may not be enough to drive out an existing infestation entirely. For best results, combine these scent-based deterrents with regular cleaning. Be sure to clean up all food spills, crumbs, and dirty dishes promptly, and keep trash cans covered with a tight-fitting lid to remove potential food sources.

The number of spiders considered normal in a house can vary significantly depending on geographic location, season, and the specific environment of the house. Generally, it's common for a home to have one or two spiders present at any time. If you consistently notice more than one spider in your home daily or you're dealing with potentially dangerous species, it's advisable to seek professional pest control services to address the issue.

Always begin by removing the gnat's source of food. Toss rotting fruit, place new fruit in the fridge, and switch the soil of your houseplants. 

The best way to get rid of gnats in the kitchen is by baiting and trapping them with something sweet. Combine water with a few drops of dish soap, apple cider vinegar, and 1 tablespoon of sugar into a bowl. Cover with plastic wrap and poke small holes to trap the gnat in the liquid.