Okay, I'm sorry but I just have to share this with you all. I think I'm the last one to figure this out, but I'm so excited! ha ha! When I got engaged there were tons of candles in small class candle holders! I have wanted to use them for our wedding, but I could not get the wax out! I found out if you freeze the glass candle holders for 30 minutes, the wax just pops out!!