These strips are suppose to be one of the holy grails. I think some people arent using them long enough or even correctly. I washed my clothes and dried for two cycles, then personal stuff sprayed, then bagged with some DE (diatomecous Earth), and put one or two in the Hefty Jumbo bags, got clear bags (Walmart/ Lowes) DE double bagged some heavy items. Anyways Ill update later because, that stuff will stay sealed off for some time like months, or over a year. I believe you have to give the product some time to work if you arent using heat.... BB are no quick fix or get rid of thingy. I ll update this down the line.