The first thing to know is your wedge "setup". I have a 54* sand wedge with LOTS of bounce (14*), and a 58* lob wedge with slight bounce (8*). I use the sand wedge in the fluffy stuff, and the lob wedge on the wet cement bunkers.
Sometimes, it is safer to just pick the ball clean or chip the ball out like they do in Japan. Also, keep in mind that if the sand is that hard, and you don't have a big lip to get over, you can always use your putter. There is no shame in using your putter to get out of a bunker, and there are no "pictures" on the score card.... only numbers.
Good luck!