Allow the stone to dry By itself. Set it inside of a dry place clear of dampness to stop bacteria progress. Then, rub a dry pumice stone above the pilling in circular motions. Really don't press as well tough because you don't want to wreck the fibers of your garment—Light https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/