Signs you have mice in your home

Mice are usually heard and found before they are seen. Here is what to look for and what to do.

Published September 24, 2026 by Purple Crown Pest Control, a family-owned pest and weed control company in St. George, Utah.

Common signs

  • Small dark droppings along walls, in cabinets, in the garage or in the attic
  • Scratching or scurrying noises at night, especially in walls or ceilings
  • Gnawed food packaging, wires or wood
  • Greasy rub marks along baseboards
  • Nests made from paper, fabric or insulation
  • A stale, musky smell in closed spaces

Where to look

Check behind appliances, under sinks, inside pantries and cabinets, in the garage, and in the attic. Cold weather pushes mice into homes, USU Extension has noted, so activity often picks up in fall.

Why they get in

Mice can squeeze through gaps as small as about a quarter inch. Gaps around pipes and wires, garage door seals, vents and foundation cracks are typical entry points.

Clean up safely. Do not sweep or vacuum dry droppings or nests. Wear gloves, spray the area with disinfectant, let it soak, then wipe it up and dispose of it. Rodent droppings can carry disease.

What to do

  1. Store food in sealed containers and clean up crumbs.
  2. Seal gaps and cracks.
  3. Clear clutter where they nest.
  4. If you keep seeing signs, call for help. Removal without sealing is a temporary fix.

See rodent control for how we handle it, and the La Verkin page for cooler-weather notes.

Need help now? Call or text (435) 525-5168 or text us for a free quote. No contracts, and every product we use is pet and kid friendly.

Ready to get rid of pests?

Tell us what you are seeing. Call or text us. No contracts.

Call nowFree quote