Muddling can get messy, especially if you're working with frozen fruit. The first rule is to address any stains right away. For surfaces like countertops or cutting boards, wipe up spills or splats immediately and rinse with cold water. If your countertops are NOT marble or natural stone, you can saturate a dish rag or paper towels with white vinegar or lemon juice and lay it flat over the stain on the surface for about ten minutes, then rinse again, and repeat as necessary. For natural stone or marble, use a non-acidic cleanser to avoid damage to your surfaces. For fabric, rinse with cold water then use white vinegar or lemon juice to pretreat. Let that sit for about five minutes, then rinse under cold water again. Repeat as necessary.