Replying to Boots wiggle sideways in bindings

My boots wiggle sideways in my Griffons. They don't always do this and it seems to be more common when it's colder. I think it starts after I've had a hard landing. It doesn't really affect my skiing but it's a little distracting especially when landing switch.

They're already on a second pair of skis so they're pretty old so don't instantly tell me to get Pivots. Is there a way to fix this? I don't know much about binding technology. Would cranking up the din help? :-D