I regularly run:
sudo pacman -Scc
and I also remove orphaned packages:
sudo pacman -Rs $(pacman -Qdtq)
From time to time I run a small script:
#!/bin/bash
rm -R ~/.cache ~/.local/share/baloo
eval $@
if [ $? -eq 0 ];
then
echo "$CMD executed successfully"
else
echo "$CMD terminated unsuccessfully"
fi
And to see what's happening in my scores, I use filelight or baobab :
pacman -Q filelight baobab
filelight 25.08.1-1
baobab 49.0-1