Defiantly doing something wrong they have a video on UTube you might want to watch on changing the blade . I use a Headblade Sport and I use it everyday or every other day and have used the same adapter for over a year now .
Found the video and yep, I didn't notice the bendy side and was probably just forcing it on the wrong side. That would take care of snapping the clip. not sure about the flexy part loosing flex. I'll try to take care that it doesn't sit on the suspension. I have a a grandchild that may have gotten a hold of it once and may have stressed that.