Cooking Spray as Candlestick Cleaner.... spray the inside of the votive holder with a thin coating of cooking spray before dropping in a tea light. After the candle has burned down, the remaining wax will slip out. (thanks real simple)
How to clean out candle jars for reuse: If you get the wax out before the water has completely cooled, do not pour the hot water down the drain. let the water cool overnight, and the next morning, the wax floated to the top and hardened.