To keep your house or working environment hygienic without having to kill insects like mosquitoes, bugs, and cockroaches, in addition to installing screen windows and doors, and keeping the environment clean, Master has recommended to us another ingenious method of insect prevention:

Spray your windows and door frames with insect repellant from inside your house, so that insects will stay outside and not come in. Do this weekly or once every two to four weeks, depending on the strength of the repellant.

This tiny loving tip may be helpful to solve a lot of problems!