I fuckin scored it and used a pen cap and the damn thing still broke . It went all over my hand and was ready to just rub it in , like transdermal type shit , but I doubt that would have worked so I washed it off and started over. This time I covered it with a paper towel and tapped the top until it broke, it worked fine other than a little glass inside. The lesson here ??? Buy a fuckin amp opener![]()