Hello friends today I have share my true experience about this hit chalk is kill the insect and cockraches was fake product are spread in day to day increase in market I was try this chalk but there is no improvements and no kill the insect but I was not purchase second time this is a worth product but there is very dangerous to avoid and keep away the children and this can be done no result to this chalk I was not satisfied to this chalk it simpfly waste of money and time I was not recommended to purchase