Former New Yorker from the old days of walk-ups and bugs. Don't keep ANY cardboard of any kind in your apartment. NONE. They love it and they nest in it. I mean not even an Amazon box. After that Borax powder is amazing and works well. I also like peppermint oil (you can get it on Amazon), spread some around...bugs hate it. You also need to get steel wool and shove it between the pipes under your sink and anywhere else bugs can come in. Then plug all your drains when you are not using them. All of that should really help.