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The safe interval for use on crops is 7-20 days.
There is a lack of conditions for cypermethrin decomposition indoors, so it can only rely on volatilization, and the time must be relatively long.
For detection, you can use a rapid test of pesticide residues.
First, it is to use an appropriate amount of sharp pepper or pepper, mash it into the end, stuff it into the moth hole, and flush it with boiling water, which has the effect of killing insects and can prevent the spread of insects. >>>More
The ceiling must be made of light steel keel or wooden keel for fire protection, and it is strictly forbidden to use wooden keels that are not fireproof.
The handle is to control the deadbolt, if this is no problem, it is a lock cylinder problem, and it costs a few dollars to change the lock cylinder >>>More
The door stopper, also commonly known as the door touch, is also a device that sucks and locates the door after it is opened, so as to prevent the wind from blowing or touching the door page and closing.
Glue the exhaust vent and plug the floor drain and sink drain.