How to prevent drown candle wicks?
Wicks drown when wax melts too fast. You’ll see a barely visible blue flame no bigger than a little seed, surrounded by a big pool of wax. Glass-encased candles often start this way, even when you end up with a nice clean burn. But if it persists for more than a day, it needs attention.
Some people pour the wax out.
Don’t do that.
Others put the candle out, let the candle cool for a while, and roll the candle so that the wax clings to the glass. This at least clears away the wax puddle so you can relight it. In my experience, though, the wax you’ve displaced to the wall just runs down and puddles around the wick again.
I prefer to splint wicks. It’s easier if you snuff the candle out. Let it cool and stab a little hole right next to the wick. Put a short piece of wick in that hole (this is why the pros save the little bits of wick they trim off new candles) and relight it. I stick my piece of wick onto the end of a chopstick with Tacky Wax and kind of “wipe” it off against the side of the little hole. Now you’ve got the power of two wicks to use up that surplus melted wax.
If you find the extra wick generates a big, soot-producing flame once it’s done its work, reach in there with a pair of kitchen tongs and pull it out.