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How to Get Candle Wax out of Glass Jars

You’ve probably seen pictures on Pinterest or elsewhere of jam jars holding candles and tealights and looking oh so magical. Magical, yes, but are they practical? By that I mean, how on earth do you clean the glass jars afterwards?!

I’m not really into candles. I’m definitely not into conventional tealights, those mass-produced paraffin (petroleum-based) white wax versions. Nor am I keen on soy-based candles, because unless it is clear where and how the soy is grown (and it usually isn’t clear) it could be contributing to rainforest destruction and population displacement. Plus, those soy tealights are often housed in polycarbonate casings – and that means single-use plastic! Beeswax would be my preferred choice, but beeswax is expensive. Besides the expense, I think they make surfaces look cluttered and just gather dust. I think candles are a luxury that I just don’t need.

Last weekend, though, I splashed out and bought some candles. We had some friends around at the weekend for a belated housewarming – it is pretty exciting to be able to get more than four people in the flat at once (that’s all the old place could handle). However, the light in our flat isn’t ideal in the evening, so my boyfriend decided it would be good to get some candles. Yes, it was his idea! We borrowed two lamps from his parents, and I bought some beeswax candles to put in glass jars.

I was determined to reclaim my glass jars once the candles had burned out. I used wide-neck jars (so I could get my hand in there afterwards), and put each candle in an upturned jam jar lid, which I thought would neatly capture all the wax

Turns out I know nothing about candles. Once they had burned out, the wax had spilled over the jam jar lid and glued it to the bottom of the jar, along with so much melted wax it was ridiculous.

Melted beeswax candleThis is what my poor glass jar looked like. The wax looked well and truly molded in there. But I wasn’t chucking it away without a fight. Oh no!

I had visions of boiling the jar in a pan to release the oil and other complicated and hazardous methods for removing the wax, but I thought I should check with the internet first, and I came across a far simpler alternative. So simple, in fact, that I wasn’t entirely convinced it would work.

Put the jar in the freezer.

Yep, that’s it. Apparently the wax shrinks slightly when frozen, just enough to loosen it from the glass.

So I stuck the jar in the freezer for an hour. This is what happened:

melted beeswax candle in a glass jar Freezing melted beeswax to remove from a glass jar Removing melted beeswax from a glass jar frozen melted beeswax leftover melted beeswax

I did use a knife to dislodge the wax, but it came out very easily. The wax is very brittle, and shatters. I’m keeping the leftover wax (HOARDER ALERT!) for the time being, as it is expensive to buy. Who knows, maybe I can make my own candles? Erm…or maybe not.

If I buy candles again, I don’t think I’ll bother placing it on a jam jar lid. It’s probably an unnecessary step.

I am so excited about this trick that I thought I’d share it with you. You know me, I love zero waste, and I also like it when you try something for the first time and it actually works! Apologies if you’re not into candles…then again, neither was I four days ago. But now, maybe I’m going to become a candle person after all.