Your raita might be runny because the cucumbers released too much water into the yogurt. Cucumbers naturally contain a lot of water, and when they’re mixed with yogurt, the water can dilute the raita’s texture, making it thinner than desired. If you're chopping or grating cucumbers, it's a good idea to either salt them beforehand and let them sit for a bit, then squeeze out the excess water. Additionally, using a thicker yogurt, like Greek yogurt or hung curd, can help maintain a creamier consistency. Balancing these steps should keep your raita from becoming too watery!