The Purly Gates

Well one of my cats ( I know who it is the snot) destroyed one of my succulents again.  He likes to rip the leaves off one by one and only does it when he knows I’m not in the same room.. This is after thinking I finally found a way to keep them from touching them.  I don’t know why he insists on doing this and it’s not all the time.  So I’m not sure what triggered him to rip this apart.  I can’t move the cactus anywhere else as they thrive really well at this window.  

  Anyone who owns cacti/succulent/air plants and cats found any effect way to deter them from touching them?  Letting him roam outside is not an option as he is an indoor cat only.  

I’ve tried tin foil and it worked for awhile but the other cats like to rip it apart so it’s not a solution anymore.  Green houses won’t work unfortunately because of apartment living.