The main problem about the rat cage only catching a rat once is the odor.
The following is a list of reasons why the rat cage can only catch a rat once or can't catch a rat:
1, the rat caught through the mouth of the warning liquid spit on the rat cage, to the other rats to send out a warning, the rat will not go.
2, the other rats saw this cage has caught rats: the rat was caught in fear of screams, other rats get a signal of danger will not enter the cage.
3, the bait is not attractive, the location is also a problem.
Summary: after the rat cage to catch a rat must be cleaned, after a period of time and then use, and so the rat lost vigilance, will catch the rat.
Expanded:
1, sealing rodent holes, restaurants or other places it is best to pay attention to the work of rodent prevention in the renovation, sealing all the holes that rats may enter. Has found traces of rats need to block the rat hole in the place, the rat hole in the wall can be based on the specific conditions of the location of the rat hole, choose to block the hole materials, such as wet soil, lime, cement, etc., while preparing broken glass, broken porcelain, broken iron as the main body. The most common mouse hole is the air conditioning hole, the general premises can use the bad cleaning ball to plug the air conditioning hole gap.
2, the use of physical methods to safely exterminate rats. The use of sticky board, will have the glue side up, according to the walking habits of rats, folded or flat in the frequent places of rats, such as walls, corners, or next to the rat holes and so on. When using the sticky board or put some food on the side, lure the mouse to eat, capture the effect is better. If the density of rats is high, you can use several sticky boards at the same time.