Especially in the kitchen, if there are some food scraps or rotten things, then the bugs will go straight into the house through the window. Also, if the door or window is open and the lights are on at night, small cities generally prefer places with light, and they will run directly into the house.
Then there is the sewer of the toilet, which is relatively large. Maybe black bugs will climb up directly from this sewer, so these places must be paid attention to.
Once you have this little black beetle at home, you must find a way to get rid of it. You can't let them breed at home. So if we want to get rid of them, we can use some insect repellent spray, that is, after finding this bug, we can spray it directly on the place where the bug appears.
In this way, they can be completely killed, and then the kitchen and bathroom must be kept dry and hygienic, cleaned regularly, and there can be no sanitary corners.