They’re coming back

Winter has ended, which means the spiders are coming back. I live in a basement room in my house and each spring and summer I have to deal with spiders that for some reason think my room is a good place to set up shop. Thankfully they’re not big spiders, but it’s still really annoying to see one of them on the wall and it freaks me out whenever one starts crawling across my foot. I really need to find where these little guys are coming in from and seal it off.