For starters, make sure to clean your candle out. The secret to cleaning glass candle jars is to freeze them for at least a few hours. All those wax scraps will solidify and harden so you can scoop it out without crumbling. Then, go in with a butter knife, crack the wax to remove, and give it a good wash. Once you have a beautiful jar ready for new life, try these handy hacks below. RELATED: 50 All-Time Favorite New Uses for Old Things RELATED: 10 Clever Ways to Reuse Planters After Your Plants Die