From the bottom of a candle holder that belongs to the girl I’m renting from:

“Because of their unusual form, decorative candles can burn unevenly and drip. Candles and decorative candles should always be placed on a suitable surface (e.g. candle plate) and may never be in a draft. Be sure to always trim the wick to 1-1.5 cm. Larger candles should always burn so long that the entire surface is liquid; otherwise they can burn out a hole. Remaining tall edges should be cut off after cooling. Never leave candles unattended, and keep them away from flammable objects! Candles do not belong in children’s hands.”

How did they even think of that many guidelines for millennia-old technology?