7 natural tricks to keep lizards away from home

Lizards don't come for your home. They come for the insects, and insects come for the light. Research published on Hemidactylus frenatus, the common house gecko, confirms that these lizards specifically forage near artificial lights that attract insects. Reduce the light near entry points at night, and you reduce their reason to visit.

Lizards have a highly developed sense of smell and find menthol, the active compound in peppermint oil, particularly offensive. Mix 15 to 20 drops of peppermint essential oil in a spray bottle of water and apply around doors, windows, and corners. Reapply every few days for consistent effect. A study in Scientific Reports confirmed capsaicin and related plant compounds trigger strong aversive responses in animals through chemoreceptors and nociceptors.

This is an old household trick with an interesting behavioural explanation. Lizards associate eggshells with birds, which are among their natural predators. Placing halved eggshells near windows, doorways, or corners signals danger and encourages them to stay away. Replace them every week or two for hygiene. No cost, no chemicals, and surprisingly effective as part of a multi-method approach.

The sulphur compounds in garlic and onion create a sharp odour that lizards find intolerable. Blend a few garlic cloves or onion pieces with water, strain the liquid, and spray it along baseboards and entry points. The smell fades for humans within an hour or two but remains strong enough for lizards. Reapply every two to three days for best results.

Lizards prefer damp, dark, undisturbed spots because those conditions support insects. Fix leaking pipes, clear out cardboard boxes stored in corners, and regularly air out spaces under sinks and behind appliances. The International Journal for Research Trends and Innovation published a study noting that habitat modification is among the most effective long-term strategies for reducing household lizard presence, alongside scent-based repellents.

Lizards enter through surprisingly small gaps, especially at the base of doors, around window frames, and through wall cracks. Use weather stripping, door sweeps, or even basic sealant to close these entry points. This is the most permanent fix of everything on this list. No trick works as reliably as simply not giving them a way in.

The strong concentrated aroma of used coffee grounds is another scent lizards tend to avoid. Sprinkle dry used coffee grounds near entry points, in corners, or along windowsills. It is completely non-toxic, costs nothing extra, and doubles up as a mild insect deterrent too, cutting off both the smell lizards dislike and part of their food source in one go.