- Unused tealights.
- Fragrance oils.
- Remove tealight from tin.
- Apply modest amount of fragrance oil to inside of tin.
- Replace tealight in tin.
- Light it up!
As the wax melts, it will blend with the oil and the room will smell nice.
I don’t know if this is cheaper than buying scented candles, but it gives you more control over the type and amount of scent used.
(Plus, I’m bored and I happen to have these supplies around the house.)