Different tweezers close in different ways, some of the tweezers are suitable for different techniques. Dumont made this way, that foot of the tweezers doesn’t close if you hold it gently, that’s why they’re best for rocking of wiggle technique. While you rocking multiple extensions, to make a fan, this gab helps extensions to open. When you see that fan opened, close your tweezers by adding a bit more pressure and peel fan of the strip. Our rest of the tweezers have no gap, but it can happen that you loose some extensions. This can happen if you hold tweezers in the wrong place. Always hold your tweezers closer to the foot. If you tried everything, please contact us for more help.