Hi there and welcome to the Community, @user40718 
I totally get why you’d love to reduce the cache time and this idea is already on the Wishlist. You can upvote it here: Update Displayed Reviews Every 24 hours (Reduce Cache).
While there is no way to reduce the cache globally now, we can manually adjust the cache time upon request! To make this possible, we’ve had to introduce an additional fee, as it came with some costs on our end.
If you’d like to adjust your cache time, please reach out to our Support Team — they’ll be happy to assist you 