To begin using your MAC Studio Fix Fluid Foundation, ensure your skin is clean, moisturized, and primed for best results. This foundation is compatible with all skin types, but those with dry skin may benefit from a hydrating primer or moisturizer, while oily skin types will appreciate an oil-controlling primer. To store the foundation, keep it in a cool, dry place away from direct sunlight to maintain its consistency and efficacy. Always ensure the cap is securely fastened after each use to prevent drying out. For optimal hygiene and application, regularly clean your makeup brushes or sponges with a gentle cleanser. Proper care of your application tools is crucial for a smooth application and to prevent product contamination.