The effectiveness of the aluminum foil hack can vary based on candle size and type. · candle tunneling is a common problem, but it can easily be solved. · use aluminum foil to fix candle tunneling by wrapping it around the wax edges and allowing it to burn. This amazing trick not only keeps bugs away but also creates a relaxing atmosphere in your home. Here’s how to use aluminum foil to fix candle tunneling and prevent it from happening. Discover how to keep candles from tunneling using simple aluminum foil hacks that save wax, extend burn time, and improve scent throw. Simply light your candle , wrap the edges in aluminum foil to create a tent, and let it burn until all of the tunneled wax liquifies. · fortunately, this tiktok video from a candle brand called otherland (@otherland) demonstrates an easy way to fix candle tunneling. Then, simply wrap your aluminium foil around the edge. You wont believe what you can do with a simple candle and aluminum foil. First, trim the wick of your candle — this helps to prevent your candle from creating soot and also maintains a healthy flame height.