Dirty Girls Pottery Tools Extra Square Bats Set Of 10  £47.70

Caring for your new Bat System:
Do not wash: It’s the key to keeping your inserts from swelling. Let it all be dirty. You can wipe your clay off when you’ve finished throwing, but the less water you’ve got on it when outside the master bat, the better.

Do not stack the insets: If possible, store them on their side.

If inserts swell: Let them completely dry out (either over several days or a couple of hours in a 95°C oven). If this doesn’t fix their fit, then lightly sand the edges as needed.