I'm brand new to grilling. I grilled my second meal just now and had the same problem I did with the first. I can't seem to get the grill hot enough. The first time, I used the char baskets and today I tried to use the two zone fire. I started with a chimney full of lump charcoal, but by the time it ashed over it was reduced to a little over half the chimney. (normal?) I put the coals in and started cooking chicken thighs and onions. The temperature dropped to below 300, so I added more lump. Everything cooked through, (though with extra time) the temperature read about 300-350 for most of the grilling, but I can't seem to get the crispy bits or grill marks. What am I doing wrong? I'm sure more coal makes it hotter, but isn't a chimney full of coal about what I'm supposed to use?