The following steps will help you in, minimizing the entrance of spiders in your home: 1) Close all the cracks near the windows, door frames, vents, and ceiling fans. 2) Seal all the openings around the pipes under the sink. 3) Put some adhesive traps for the cockroaches, but keep in mind that these traps should be out of reach of children. You can keep them near doorways with the walls under and behind the furniture and gadgets. 4) You can also remove webs and spiders by vacuuming. 5) Out of all of the above you can also contact a pest exterminator and can assess your building for the indications of spiders.