Mask Odors with Old Candlewax
In addition to being pricey, car fresheners are often ineffective and do not smell pleasant at all, according to some people. Thanks to the invention of the mason jar and the popularity of scented candles, you can create your very own personalized vehicle freshener at home. Here’s another car trick that will help you eliminate smelly smells.

Fill a mason jar or any other container halfway with old candle wax and poke a few holes in the top of the container. Place it in your cup holder, and now whenever the temperature in your car rises, the candle wax will slowly release its natural scent.