How should I store the scrub to keep it effective, and does it have a shelf life?

To maintain the scrub's consistency and effectiveness, store the jar in a cool, dry place away from direct sunlight and heat sources like radiators or bathroom windowsills. The natural oils (like grapeseed oil) can separate from the salt over time, especially with temperature fluctuations, so giving the jar a gentle stir before use is normal and recommended. While cosmetic products often have a Period After Opening (PAO) symbol indicating months of safe use after first opening, a general guideline for salt-based scrubs is to use them within 12-18 months. Signs the scrub may be past its prime include a significant change in texture (e.g., the oil becoming rancid, which is indicated by an off smell), discoloration, or the development of mold. Because the product is used on damp skin, always use clean, dry hands or a spatula to scoop it out to avoid introducing water and bacteria into the jar.