Allow the stone to dry on its own. Set it inside a dry region away from dampness to prevent microbes progress. You will discover a pumice stone at your local pharmacy, Division retail outlet, or even the personal care area in the supermarket. They’re accessible through online merchants far too. https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/