Unable to run xrdb command to resize cursor when logging in

happy XFCE4 user here, I (unluckily) switched to a notebook with 4k display. I managed to adapt most of the aspects, still when hovering on Chrome or Xfce Terminal **the cursor is tiny**. I found that running xrdb -merge ~/.Xresources where ~/.Xresources contains: Xcursor.size: 48 fixes the problem — still have to check the result on an external monitor. **Now the problem is how do I run the command when the computer starts!** I put this in ~/.xprofile: [[ -f ~/.Xresources ]] && xrdb -merge ~/.Xresources which seems to be executed, nevertheless the cursor problem remains. I suppose some command is resetting it because if I open a terminal and I manually give the xrdb -merge ~/.Xresources command again it gets sorted at last