Old John Boldero's tip for making a candle last: put it out. It is a dry little joke dressed up as household advice, from an age when a candle was worth rationing.
From Mother Goose / Nursery Rhymes (traditional). See the whole collection.
To make your candles last for aye,
You wives and maids give ear-O!
To put them out's the only way,
Says honest John Boldero.
Public domain. Text from The Real Mother Goose (Blanche Fisher Wright, 1916), via Project Gutenberg. View the source edition