There are two effective options to destroy mould:
1) Sodium Hypochlorite (bleach) solution. Sodium hypochlorite works well at low concentrations and is effective against both mould and mould spores . It is cheap and readily available.
2) Heat treatment (95 degree cycle on a front loader), this cannot be used on PUL/elastics.
*AGAIN, DO NOT PUT SHELLS/AIOs/NAPPIES WITH ELASTICS INTO A 95 DEGREE CYCLE*
See the sanitise instructions on the Strip and Sanitise page for information on using bleach or 95 degree cycle to treat mould.
To remove stains caused by mould, use a Vanish/Napisan type product.
Although soaking in undiluted household vinegar (5% acetic acid), is effective against mould, it has a pH of 2 (very acidic) and this causes unnecessary wear and tear on nappies, therefore it is not recommended for use.
Clove oil or cinnamon oil are only effective against mould at 250ppm  , this information is not labelled, so there is no way to tell what the concentration of the active components (cinnamic aldehyde and/or eugenol) are, and therefore there is no way to ensure that the oil will be effective.