On 17 Jun 2015 13:50:22 GMT, notbob wrote:

On 2015-06-17, trader_4 wrote:

Typically besides the burners, the flame spreader bars go too.

Whatever happened to lava rocks?

Lava rocks have fallen out of favor because they did just what they
were advertised to do - smoke your food by heating fat droppings to a
very high temperature which then smoked. That helped flavor the food,
but some believe heating meat fat until it smokes creates cancer
causing molecules that end up in you. I don't know how much of a
problem that really is, but it is why you don't see many lava rocks in
grills these days.