After I learned from my first mistake, double layer the sand, and then put a third layer on for the cook. Keep changing the third layer every cook and this will not happen again. Make sure you use the wide roll of heavy duty foil that will cover the whole pan in one pass. After I started doing it this way, it is much easier than cleaning the water pan. All you do is change one sheet every cook. A lot easier than cleaning the pan IMO.
To answer the post though, (I forgot to on my first reply lol) I used a screwdriver and hammer. My whole pan wasn't glassed over though, only sections.
The money you save on fuel using sand, you can just buy another pan for the sand/water.
Now on a side note, I did buy another Brinkman charcoal pan to use, (2 actually) I did a Picnic cut for dinner last night using water to refresh my memory on how different the bark was using water vs. sand. I did everything as I would any other time, (spray basting, prep) the water being the only difference. The bark was softer and easier to cut up and mix into the pulled pork than I have been used to using sand. I don't base any opinion on one cook, so will try again to see if I get the same results. This cut did seem to have more fat then usual. I am going to do Spares on Saturday, will see what happens with spares and another Picnic before I make a final call between the two.
So I would have to choose between saving fuel, easier to deal with, or a softer bark that the family liked better mixed in, and a pan to clean, and higher fuel cost.