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While cockroaches can contaminate appliances and their contents, they won't cause damage. Cockroaches can spread bacteria like E. coli and salmonella, making it important to keep them out of places where food is stored, such as a refrigerator. When it comes to electronics, however, cockroaches could potentially damage internal electrical components. As the pests navigate inside a TV or console, they may touch high-voltage components that could short out your product. This damage could lead to costly repairs or require replacements.

Consumer-brand foggers or bug bombs are considered safe overall. Still, it's essential to read the instructions carefully as the vacating time varies depending on the type of bug bomb you use. Most of the time, it's advised that all humans and pets are out of the area for at least two to four hours after initiating the fogger process. It's also a good idea to vent the space by cracking open some windows for several hours after you're back inside.

The signs of a bed bug infestation include itchy, red bite marks on the skin and various forms of physical evidence on or near your bed. Look for reddish or rust-colored stains on sheets from crushed bed bugs, as well as small, dark fecal droppings. You might also find the bugs themselves, their tiny eggs, or the pale, molted skins (casings) they leave behind. In some cases, a persistent musty odor may be present. If you notice any of these signs, calling a professional exterminator is the most effective way to handle the infestation.

It’s very uncommon for roaches to bite humans. Cockroaches don’t need humans for food and prefer to be elsewhere than on a living being. They have no poison or powerful pincers to cause any significant damage. However, in very bad infestations cockroaches have been known to search humans for dead skin cells, which leads to them nibbling around feet, hands, and eyelashes. They don’t cause any serious harm, but this is an easy way to spread the diseases cockroaches carry.