We use the highest quality, clean burning fragrance oils on the market. Our fragrances are free of phthalates, carcinogens, toxins, solvents, and other hazardous chemicals. We only use pure sox wax and cotton wicks for the cleanest, soot-free burn possible. Soy candles perform differently than paraffin candles, so you'll need to adjust your burning habits. Trimming your wick before each burn will prevent smoke and wick clogging, and the first time you burn your candle, be sure to allow the top to melt completely before blowing it out. Soy wax has a "memory", so if you blow it out before the entire top melts (on that first light only), your candle will burn with a hole in it. Finally, never snuff out your flame with the lid or trap smoke in the jar as soy wax will absorb the smokey smell. Always use practical safety precautions when burning your candle; never leave a lit candle unattended, do not burn near flammable materials, and never burn for more than 4 hours at a time. If you follow these instructions, you'll get at least 250 hours of burn time with each of our candles.