The best way to keep your candle performing at its best is to keep the wick trimmed. And the best way to trim the wick is with a specifically designed wick trimmer.
The long neck means it can easy reach the wick - even when more than 1/2 of your candle has been burned, and the special design will snip and catch your spent wick all at once.
Trim your candle before each burn to keep your wax free debris and excess carbon deposits.