We have a heat ' glo gas fireplace at my in-laws' where we are staying for several months and I opened it up today to rearrange some of the faux wood as it appeared to have shifted. In the process I wasn't thinking very clearly and when I saw all that flaky stuff right on the burners I assumed it was some sort of dust or residue that had accumulated and I thoughtlessly brushed it all to the back. Immediately I realized that it was the stuff that glows red hot like ashes, making the fire look more real. So, what should I do now? When I brushed it away it sort of crumbled. Can I buy more of that stuff? Is it important?