Sure can. When coals are made part of the process is removing almost all of the moisture out of them. When they sit around exposed to air, they will begin to absorb moisture from the air, sort of like a sponge will absorb a water spill if you lay in the water. The moisture will fill in any tiny spaces between the solid parts of the coal, thereby causing it to light ineffectively and can also cause certain chemical reactions with the other parts of the coal, resulting in a nasty taste as well as a slow and uneven burn. Smoke happy.
Originally Posted by cdplayersony
the moisture in the air is enough to affect the coals that much? thats crazy