If the instructions had been followed exactly, they would have worked effectively. Please let me know if you'd like a replacement pack or further assistance by replying to my private message. I'm here to help De 3M 2080 reeks maakt toepassing met geavanceerde technologieën, bijvoorbeeld 3M Controltac en 3M Comply, http://wiki.iurium.cz/w/Panduroingram2726