Size of Kopia repository

The size of my Kopia repository is growing, even though I have deleted snapshots from a particular date and also deleted all snapshots for one particular job which was almost 90GB. I did not see my repository shrink by 90GB. Is there something I need to do in order to reduce the size of the repository after deleting snapshots?
Thanks in advance for your assistance.

you probably need to wait for (or run manually) a maintenance task

Thanks Dan, how can I manually run a maintenance task?

Perferably with “–full” if you need data to clean out, I guess.