I have been using scented/unscented candles donated to me by the neighbor ladies for several years now with good results. See no point in changing up. I wax biweekly and have several chains in rotation for each bike averaging around 300 to 400 miles depending on the weather when riding. If it's wet I move up the rotation frequency. Only chain I've had a problem with since starting this routine was a Chinese counterfeit that stretched out within 2000 miles while the others in rotation hadn't shown any signs of wear. This is my personal experience, your's may differ. I only use the candles because it makes the neighbor ladies feel like their contributing to the cause (don't ask what cause)
