Questions
Common questions.
More in Get help. Sources are on Why not poison.
Is Check my house free?
Yes. There’s no sign-up and nothing to buy. It runs in your browser.
How small a gap can a mouse use?
About the width of your finger. That’s the finger-width rule, and it’s why the check asks you to look closely at seams, corners and pipe holes.
Can mice affect allergies or asthma?
They can. Mice leave allergen in household dust, and a national survey found it in 82% of U.S. homes. NIEHS researchers found that in people with allergies, higher levels at home were linked to more asthma symptoms. If someone in your home has asthma, ask their doctor about mouse allergy. Mice come in for shelter, so sealing the gaps keeps new ones out, with no poison, ever.
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Sources: NIEHS national survey8 · NIEHS asthma study10