The reason that bug splash can bring about harming is that it contains a substance called "DEET"(N, N-diethyl-m-toluamide).
This avoids mosquito conceived maladies however is not fit for human utilization. In the mean time different less compelling adaptations contain pyrethrins. This is a milder substance that is less compelling at keeping mosquitoes under control, yet which is less inclined to bring about sickness subsequently. Be that as it may it can at present cause breathing troubles if breathed in.