Candle warning labels contain the following text:
"WARNING! Jar is fragile and may become hot when in use. Do not handle hot jar. Keep wick trimmed to 1/4 inch. If flame smokes, extinguish, trim wick, and relight. Burn candle on a protected surface away from flammable materials and drafts. Extinguish flame before replacing lid. Do not allow candle to burn less than 1/2 inch from bottom of the jar. Keep out of reach of children and pets."