Cockroaches can be a real nuisance, and they aren’t just gross, they can also be dangerous. Not only do they cause allergies, but they also spread bacteria and germs. With this in mind, it's important that you know the signs of a cockroach infestation so that you can take action by calling Pest Control Bacchus Marsh company as soon as possible! Cockroach Droppings If you see droppings in your home, this is a sure sign that you have a cockroach infestation. Cockroaches produce small black or brown spots on surfaces and tiny dark-coloured pellets called frass. Frass looks like coffee grounds and can be found near the roach's hiding places. It may also have an odour similar to musty cardboard or wood shavings. If you notice stains on furniture, walls, and floors in your home (especially if they look like dried coffee grounds) it could be from cockroach droppings as well as urine splatter from their running around during the night trying to find food sources for themselves or ...