Medium Hourglass Woodwick® Candles fill your home with sophisticated scents and a soft crackle from a natural wooden wick that Crackles as it Burns™. The distinctive crackle of WoodWick® candles is created by a patented PLUSWICK® Innovation technology, designed to ensure a safe and consistent multi-sensory experience with faster fragrance and an optimal burn while fragrancing your home with the sound of a crackling fire. WoodWick® candles can display different burning characteristics than other candles, so here's a few simple steps to enjoy the best burn every time: 1. You will experience the best burn results when the candle remains lit for 3-4 hours. Make sure that the wax melts to the edge of the candle before extinguishing it - this may take between 30 to 60 minutes. Allowing the wax to pool will discourage tunnelling or leaving wax on the sides of the vessel. 2. The flame height may vary at times and occasionally even appear to self extinguish, but this is normal. Even if you are experiencing a low flame, it will continue to heat and the flame height should return. 3. Keep the candle within sight and away from drafts. Always place the candle on a flat, heat-resistant surface, and make sure to keep the candles away from children, pets, flammable materials and other heat sources. 4. Never move or handle the candle while it's burning or while the wax is hot. To be safe, only move your candle once the flame is extinguished and the wax has completely cooled. When there is approximately 1cm of wax remaining, it is time to stop using your candle. Extinguish the candle and recycle it according to your local recycling centre's guidance. Alternatively, why not give your empty candle a new lease of life by upcycling your empty candle in to something for your home?