Which mark on walls or counters indicates the presence of pests?

The presence of pests is often indicated by black greasy looking marks. These marks are typically left behind by rodents or other pests as they move around an area. Such marks result from the oils and dirt on their fur, which they transfer onto surfaces they come into contact with. Identifying these marks is crucial for maintaining a pest-free environment, as they can signify active infestations that need immediate attention.

Fresh paint may simply indicate recent maintenance or renovations and does not relate to pest activity. Dust accumulation could suggest a lack of cleaning, but it doesn't specifically indicate pest presence. Visible signs of cleaning suggest an area is being well-maintained, which often helps reduce the likelihood of pest problems, but again, this does not directly indicate that pests are present. Therefore, recognizing black greasy marks on walls or counters is essential for effective pest management.