The answer to 'why is my rat trails' is that rat trails are signs of an active rodent infestation in your home. Rats leave behind visible paths or trails as they move around, often along walls and baseboards, in search of food and shelter. These trails are created by the oils and dirt from the rats' fur rubbing against surfaces.
Common causes of rat trails include a lack of proper food storage, entry points in the home's exterior, and nesting areas. Seeing rat trails is a clear symptom that you have a rat problem that needs to be addressed. Solutions may include sealing up entry points, removing food sources, and using humane traps or calling a professional pest control expert to safely and effectively eliminate the rats.