Kia ora Iris,
Thank you so much for your review, though I'm so sorry to hear you've found mould on your Storage Tray.
Our trays are made from diatomaceous earth and can't support mould growth, but mould can digest and grow on the dirt, dust, and organic residue that accumulates on the tray. This can also include any water (even the smallest of droplets) that has pooled either in the grooves or underneath the tray.
To prevent the growth of mould spores we recommend washing your trays once a week in hot soapy water (or the dishwasher) and allowing them to air dry.
If you're not comfortable continuing to use this Storage Tray please dispose of it in your garden or plant pot, where it will eventually break up and be used as substrate for plants and microbes.
To make up for this one as a one-off, I would love to send out a replacement Storage Tray so you can start fresh.
If you would be interested in this, can you please email us at hello@ethique.com and confirm your delivery details?
~ Georgia