The remarkable repellent properties of M. piperita essential oil were established against adults Ae. aegypti. The application of oil resulted in 100% protection till 150 min. After next 30 min, only 1-2 bites were recorded as compared with 8-9 bites on the control arm.
For 2.5 hours you get zero bites
For the next half hour you get a few.
That is effective, whether you understand it or not, your opinion just doesn't over ride science buddy. No matter how strong your feelings are for whatever reason.