There are a few reasons why your sugar scrub may have become hard. Understanding these factors can help you troubleshoot and prevent this issue in the future.

1. Moisture exposure: Sugar scrubs typically contain a combination of oils and sugar. If the scrub is exposed to moisture, such as water getting into the container or using wet hands to scoop out the scrub, it can cause the sugar to dissolve and the oils to solidify. This can result in a hard, clumpy texture.

Solution: Ensure that your sugar scrub is stored in a dry, airtight container to prevent moisture exposure. Use dry hands or a dry spoon to scoop out the scrub.

2. Temperature fluctuations: Extreme temperature changes can also affect the texture of your sugar scrub. If it is exposed to high temperatures, the oils can melt and then solidify again when cooled, leading to a hardened consistency.

Solution: Store your sugar scrub in a cool, dry place away from direct sunlight and heat sources. Avoid keeping it in the bathroom, where humidity levels can be higher.

3. Ingredient ratios: The proportions of oils and sugar in your sugar scrub recipe can impact its texture. If there is too much oil compared to sugar, it may result in a greasy and hardened scrub.

Solution: When making a homemade sugar scrub, ensure you follow a balanced recipe that provides the right ratio of oils to sugar. Adjust the ingredients as needed to achieve the desired consistency.

4. Shelf life: Over time, oils in the sugar scrub can oxidize and solidify, causing the scrub to harden. This is more likely to happen if the scrub is stored for an extended period or if the oils used have a shorter shelf life.

Solution: Use your sugar scrub within the recommended shelf life mentioned in the recipe or product instructions. If making a homemade scrub, consider adding natural antioxidants like vitamin E oil to help extend the shelf life.

By considering these factors and implementing the suggested solutions, you can prevent your sugar scrub from becoming hard and maintain its desired texture for a longer period of time.