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Australian summers are hot by nature — beach days, road trips, and long hours in the sun are part of everyday life. But when your skincare, sunscreen, or haircare products spend hours sitting in a warm car or beach bag, it’s fair to ask: does heat actually affect them? The short answer: sometimes — and enough that it’s worth paying attention. How heat can impact skincare products? Most skincare and sunscreen products are carefully formulated to stay stable within certain temp