Good knight mosquito is very effect to banned the mosquito to enter in home. It is effective but not affordable as price is high for each bottle. Now good knight mosquito repellent is available in different fregnances. It is smokeless. One bottle can last for 3-4 days if we use it in normal mode for whole night. We should kept it away from heat or sunlight. In active mode it really works within 5min in my home.