Handling distributed caching in microservices can be tricky.

im working on a microservices architecture and we're thinking about implementing a distributed caching layer. we've looked at Redis and Memcached, but im wondering about best practices. how do you guys manage cache invalidation across multiple services? are there specific patterns you find effective for ensuring data consistency when one service updates a cached item that other services might be using? looking for real-world examples and common pitfalls to avoid.