Mice are nocturnal creatures, preferring to keep hidden during the day.
Some common signs of mouse activity include:

• Droppings – 50/ 80 droppings a night, small and dark (approx. 3 – 8 mm in length), scattered randomly, check inside or on cupboard tops or along skirting.

• Grease marks (smudges or smears) – Caused by their bodies brushing against walls, floors and skirting on regular routes, dark smears around holes or around corners.

• Urine pillars – In established or heavy infestations, body grease, combined with dirt and urine, builds up into small mounds, up to 4cm high and 1cm wide.

• Scratching noises – Often at night when mice are most active. Listen for noises between partition walls, under floorboards, in false ceilings, basements and lofts.

• Nests – Using easy to shred materials, mice then line the nest with other soft materials. Check lofts, suspended ceilings, cavity walls, under floorboards and behind fridges, under stoves and in airing cupboards.

• Tracks (footprints) – Dusty environments such as unused lofts and  basements can show up rodent tracks and tail marks. To check for activity, sprinkle flour, talcum powder or china clay and check the next day for fresh tracks.

• Live or dead mice – Spotting a mouse during the daytime can be an indication of a heavy infestation.

• Strong smell – Mice urinate frequently and their wee has a strong ammonia-like smell. The stronger the smell the closer you are to mice activity. This smell can linger for a long time (even after an infestation has been removed).