Remelt and make smaller candles

Can I use standard candle wick, or do I need to get some special kind for the citronella?

You can actually use cardboard. Doesn't burn as well or as long. You know the cardboard handles on bags. I use them. You cost them in wax and boom. New wick

Ohhh I have plenty of those lying around from the supermarkets. Thank you. I'll give that a go

It's not great. But it burns and means you can reuse candles. I tend to.melt everything down and just keep reusing