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 Een 3M 2080 reeks vormt toepassing betreffende geavanceerde technologieën, bijvoorbeeld 3M Controltac en 3M Comply, https://www.metooo.it/u/6761c188acd17a1177231d3a