Hi Ladies,
I would also suggest adjusting your cleats to make them easier to get out of. You can adjust to where you basically come out with the slightest movement (beginning) and then adjust to harder as you get used to the timing and movement. Your LBS should be able to do this for you.

I also have knee issues and balance exercises have really helped strengthen all those little muscles that are needed to keep your knee aligned properly. Even just balancing on one leg for a period of time can really make a difference.

Good Luck!