A common fault I find in players’ technique in greenside bunkers is creating too aggressive an angle of attack into the sand. This tends to make the leading edge of the club dig deep into the sand, decelerating the club and producing inconsistent results.
Here’s a simple tweak to the setup and a drill for the practice ground which will improve your technique and lead to more up and downs.
In your setup – take a wider stance. This should help create a shallower angle of attack, bringing the club into the sand behind the ball more consistently.
A great drill once you’re in this position is to hit bunker shots with just your right hand (for the right-handed golfer). This will give you a great feeling of the club releasing, carrying its speed through the sand, using the bounce on the club correctly and popping the ball out with more consistency.