In your room, protect the windows with fine screen cloth. Draw a few circles around the door with chalk to drive away cockroaches or mice, and then draw them again once a week to ensure the efficacy.

Keep the room clean and tidy, keep things neatly stacked as far as possible, and put sundries in other rooms. Keep as little large furniture (especially wooden furniture) as possible in your room.

Try to make the room dry and ventilated, close the window or close the curtains after turning on the light at night to reduce mosquitoes and moths.

Try to plug the small gaps in the corner and add a fine barbed wire to the drain; Smoked mosquitoes, cockroaches and heavy geckos regularly. Buy that powerful cockroach repellent. Of course, don't smoke by yourself before going to bed or when you are not in the room.