We get it — messes happen! Please follow these instructions for cleaning your Warmies: Use a damp sponge, towel, or antibacterial wipe, to lightly spot-clean your Warmies. Use a soft brush to refresh the soft touch of your Warmies. Store in a cool, dry place after each cleaning and use. Because Warmies contain flaxseed and dried French lavender, putting them in a washing machine or submerging them in water will cause the filling to swell and potentially ruin the product. Fortunately, spot cleaning should work just fine!