what do roach smear marks look like

Roach smear marks are dark, greasy stains left behind by cockroaches as they move across surfaces. These marks are typically brown or black and can appear shiny or smeared, often in areas where roaches have traveled, such as walls, baseboards, or countertops. The smears are caused by the oils and dirt that cockroaches carry on their bodies. The marks may also sometimes have a slightly sticky or greasy texture. Over time, these stains can become more pronounced, especially in areas with high roach activity, and they can be a sign of an infestation.