Traditional wick doesn't last forever. You forget to blow it out or wet the wick so it goes on smouldering.
Ever time this happens you lose a little bit of wick. With a stainless steel wick you never need to replace
It burns just as well and unlike traditional wick there is no ash/soot deposits on the glass.
We cut it perfectly to length. Just take out the old wick and slide in the new wick.