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 LET OP: De 3M Dual Lock is in totaal 2 meter, dit is doeltreffend 5 https://intern.ee.aeust.edu.tw/home.php?mod=space&uid=1314518