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Yes. German cockroaches are masters at hiding. If you notice one cockroach, especially in daytime hours, it’s very likely that other roaches aren’t far behind, or that the problem is growing. You don’t even need to see roaches to have warning bells go off: Many homeowners discover roach problems by noticing specks of droppings on the floor or roach smells.

There are several possible reasons for a gnat infestation, and they vary based on the type of insect. One common reason is overwatering houseplants, which can create a moist environment that is attractive to fungus gnats. Another reason is leaving fruit out on the counter for too long, which can attract fruit flies. Drain flies are typically attracted by standing water and bacteria that are often the result of buildup or a clog in your drain or sewer line.

Most spiders are harmless and are more interested in finding and eating insects than trying to bite you or your family members. Certain spiders in your home may be advantageous if you have an issue with insects. Most spiders are non-venomous and have small mouths, so even if they did bite you, it wouldn’t be enough to cause any harm.

However, some species of spiders can cause harm if you are a victim of their spider bite, including the black widow and brown recluse varieties. Both species’ venom is poisonous, and you should seek medical help if bitten.

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.