thanks.. the thing is that the basement is a concrete ledge with cinderblocks so there is exposed dirt between the ledge and the cinderblocks where the silverfish and humidity crawl in (as well as a sump pit which i am working on closing up soon)... and there are tons of them outside... ill fumigate for the thrips and buy a dehumidifier as well (what humidity do you recommend?) and hopefully this will work for me.