For safe candle burning and maximum candle life:

Burn candle within sight. Keep away from drafts and vibrations. Keep out of reach of small children and pets. Never burn candle on or near anything that can catch fire.

Trim wick to 1/4 inch before lighting. Keep candle free of any foreign materials including matches and wick trimmings. Only burn candle on a level, fire-resistant surface. Do not burn candle for more than four hours at a time or let it burn all the way down. For margin of safety, discontinue burning when 2 inches of wax remain (jar) or half wax (tin).

To prevent uneven burning and that annoying “well” down the center, light the candle and burn it at least long enough for a pool of wax to form across the entire surface before extinguishing. This guarantees a smooth burn and long life for candle.