I found this recently and it works like a charm. No need to buy more memory, this little action clears it out every five minutes!
It's bit tricky to install but here are the links. On the YouTube instructions I used the second method he demonstrated.
https://www.youtube.com/watch?v=kaIGatqglVQ
And here is the exe file
https://wj32.org/wp/software/empty-standby-list/