Sorry this is a bit off topic but thought someone may be able to advise. When we moved in there was an open fronted gas coal effect fire which gave off a horrible smell. I presumed it came from the artificial coals & because I was unable to find replacements, we bought a new fire, again a coal effect one but this time with a clear glass front panel sealing the assembly. However this one is also beginning to smell & I wondered if this was a common thing & also if I can replace the coals with artificial stones rather than coals or will they smell just as bad. Thanks for any advice