Pros

  • Effective in repelling spiders, with no sightings for over three months after application.
  • Successfully lasted through rain and adverse weather without losing effectiveness.
  • Easy to set up and use.
  • No adverse effects on painted surfaces, although a spot check is recommended.
  • Prevents ants from crossing initially and affects pests like earwigs and pillbugs.
  • Applied both indoors and outdoors, including garages, with hopes for continued effectiveness.

Cons

  • Sprayer failed from first use, even after battery replacement, making it necessary to transfer the insecticide to another spray bottle.
  • Potency is questionable as results were not as expected, with large spiders appearing unaffected.
  • Not effective against house flies or certain spider varieties like daddy long legs.
  • Required a second coat after a week due to pests reappearing.
  • The pump mechanism is frustrating and stopped working after a month, leaving the solution bottle half full.

Bottom Line

The Ortho Home Defense Insect Killer is handy for dealing with common outdoor spiders and certain pests initially, but be prepared for potential sprayer malfunctions and the need for reapplication to maintain effectiveness. If you have persistent issues with the pump, consider transferring the solution to a different spray bottle for continued use.

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