i just got some powergrips and im having a hell of a time getting used to them, so far they seem to me to work better around the tip of toes as when i get my whole foot in there and pull up nice and hard my feet come off the pedals... im sure tighter straps will work better, but if i tighten them i wont get my foot in, is this a break-in issue or do others have these issues with powergrips?