Hi Leon, Thanks for letting us know that you're happy with your new slippers! We're sorry to hear that there was a spill on them. We thought that it may be helpful to let you know what we do to keep our own Nuknuuks looking fresh. The first step is to try to wipe the stain with a clean, damp cloth. If this does not work, try using a suede cleaning eraser or a suede brush. To clean the sheepskin or the synthetic lining, dilute 1 tablespoon of gentle liquid detergent with 1 cup of warm water. Dampen a cloth with the mixture or use a very soft brush dipped in the mixture to gently rub the stain. It may take a couple of days for the product to completely dry. We do not recommend use of washing machines or dryers. Never expose the product to excessive heat or sunlight. Once you've removed the stain, we recommend the use of suede spray in order to protect your Nuknuuks from future spills. Please ensure that you follow all manufacturer's instructions and that you test a small area before spraying. There may be slight variations in colour and texture after applying the spray. Please note that we are not responsible for any changes to our products following application of protective sprays. We hope that this information is helpful and that it allows you to continue to enjoy your Nuknuuks for a long time!