Monofin - one tip bending away

[BeaverTailFin]

Hi!
I'm a monofin newbie and I acquired a used sport fin from leaderfins. Now my problem is, that one tip is bending away when I do the kicking. It's always the left side and I already tried to vary the power between the left and the right leg, but that doesn't seem to help. I once tried a Waterway fin and I'm pretty sure that I haven't had that problem there. :duh

 

[glubglub]

I recently have this problem too. It's very annoying and I found out that my foot pocket cracked on one side, and the foot pocket tip where the toe is started to separate as well. This resulted in me keep ramming the pool divider, or in the ocean, if I'm not very mindful about keeping a good traction, can make me swim in wide circles. To be fair, my mono has been used over 450 km (mostly horizontal), so I guess it has its time.