Decided it was time to take out the cheekpads to give them a nice wash the other day. To do wash the liner you have to take the whole cheekpad out, then peel off the material over the foam. Left them out for a few days whilst liner was washed/dried, then put it all back together today. The foam seems to have expanded so its alot more 'fitting', gripped to my cheeks kind of thing. So I guess if you're helmet isn't as tight inside as it used to be (and you can remove your cheek pads), maybe give it a go.