Can you instruct me on litter box maintenance?

I’m looking for information only from experienced cat owners. Others are welcome to read, but kindly refrain from answering.

I have a good box with a top. I use a liner and clumping clay litter, which Saki prefers. I scoop it at least once a day and sometimes twice.

There is little odor because of the top. One brand of litter controls odor better than the other brand.

Am I supposed to completely empty the litter on a schedule? I’m changing it but only monthly. One site said weekly.

One friend mentioned I’m supposed to change the scoop weekly and wash it after use.

Saki seems perfectly happy with how things are.