I’ve had success with food-grade diatomaceous earth sprinkled on carpets (left for 12 hours then vacuumed). Just make sure pets aren’t in the room during application!
Most ultrasonic devices don’t emit consistent frequencies. I measured mine with a sound analyzer - the output was all over the place. No wonder they don’t work!
@MouseHater22 How often do you reapply your lavender/cedar mixture? I’d love to try this but worry about maintaining effectiveness.
After wasting $80 on an ultrasonic device, I learned the hard way: monthly topical treatments + thorough house cleaning is the only reliable solution.
This discussion saved me from an impulse buy! Will stick to vet-recommended treatments instead of experimental gadgets.